diff --git a/db/migrate/20240716141505_create_content_block_edition_authors.rb b/db/migrate/20240716141505_create_content_block_edition_authors.rb
new file mode 100644
index 00000000000..cf89d5869e7
--- /dev/null
+++ b/db/migrate/20240716141505_create_content_block_edition_authors.rb
@@ -0,0 +1,10 @@
+class CreateContentBlockEditionAuthors < ActiveRecord::Migration[7.1]
+  def change
+    create_table :content_block_edition_authors do |t|
+      t.references :user, index: true, null: false
+      t.references :content_block_edition, index: true, foreign_key: true, null: false
+      t.datetime "created_at", precision: nil, null: false
+      t.datetime "updated_at", precision: nil, null: false
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 8ca9f248e51..ea1dce6b1bf 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.1].define(version: 2024_07_01_080000) do
+ActiveRecord::Schema[7.1].define(version: 2024_07_16_141505) do
   create_table "assets", charset: "utf8mb3", force: :cascade do |t|
     t.string "asset_manager_id", null: false
     t.string "variant", null: false
@@ -199,6 +199,15 @@
     t.datetime "updated_at", precision: nil
   end
 
+  create_table "content_block_edition_authors", charset: "utf8mb3", force: :cascade do |t|
+    t.bigint "user_id", null: false
+    t.bigint "content_block_edition_id", null: false
+    t.datetime "created_at", precision: nil, null: false
+    t.datetime "updated_at", precision: nil, null: false
+    t.index ["content_block_edition_id"], name: "idx_on_content_block_edition_id_9e1066caab"
+    t.index ["user_id"], name: "index_content_block_edition_authors_on_user_id"
+  end
+
   create_table "content_block_editions", charset: "utf8mb3", force: :cascade do |t|
     t.json "details", null: false
     t.bigint "content_block_document_id", null: false
@@ -1309,6 +1318,7 @@
     t.datetime "updated_at", precision: nil
   end
 
+  add_foreign_key "content_block_edition_authors", "content_block_editions"
   add_foreign_key "content_block_editions", "content_block_documents"
   add_foreign_key "documents", "editions", column: "latest_edition_id", on_update: :cascade, on_delete: :nullify
   add_foreign_key "documents", "editions", column: "live_edition_id", on_update: :cascade, on_delete: :nullify
diff --git a/docs/diagrams/object_store_models.png b/docs/diagrams/object_store_models.png
index ff6361b8084..55d79f362b2 100644
Binary files a/docs/diagrams/object_store_models.png and b/docs/diagrams/object_store_models.png differ
diff --git a/docs/diagrams/object_store_models.puml b/docs/diagrams/object_store_models.puml
index a2c6603dbe0..b7f13949c68 100644
--- a/docs/diagrams/object_store_models.puml
+++ b/docs/diagrams/object_store_models.puml
@@ -20,6 +20,12 @@ together {
     ContentBlockEdition .> content_block_editions
 }
 
+class ContentBlockEditionAuthor {
+        user_id
+        content_block_edition_id
+}
+
 ContentBlockDocument *-r- ContentBlockEdition : "has_many"
+ContentBlockEdition *-r- ContentBlockEditionAuthor : "has_many"
 
 @enduml
diff --git a/lib/engines/content_object_store/app/components/content_object_store/content_block_edition/show/summary_list_component.rb b/lib/engines/content_object_store/app/components/content_object_store/content_block_edition/show/summary_list_component.rb
index 9178e4706b3..aaf81ee1b6b 100644
--- a/lib/engines/content_object_store/app/components/content_object_store/content_block_edition/show/summary_list_component.rb
+++ b/lib/engines/content_object_store/app/components/content_object_store/content_block_edition/show/summary_list_component.rb
@@ -8,7 +8,7 @@ def initialize(content_block_edition:)
   attr_reader :content_block_edition
 
   def items
-    [title_item].concat(details_items)
+    [title_item].concat(details_items).concat([creator_item])
   end
 
   def title_item
@@ -23,4 +23,11 @@ def details_items
       { field: key.humanize, value: }
     end
   end
+
+  def creator_item
+    {
+      field: "Creator",
+      value: content_block_edition.creator.name,
+    }
+  end
 end
diff --git a/lib/engines/content_object_store/app/controllers/content_object_store/content_block_editions_controller.rb b/lib/engines/content_object_store/app/controllers/content_object_store/content_block_editions_controller.rb
index 110c3edc3c6..73ccac162d7 100644
--- a/lib/engines/content_object_store/app/controllers/content_object_store/content_block_editions_controller.rb
+++ b/lib/engines/content_object_store/app/controllers/content_object_store/content_block_editions_controller.rb
@@ -34,6 +34,6 @@ def root_params
   end
 
   def edition_params
-    root_params.permit(:title, :block_type, details: @schema.fields)
+    root_params.permit(:title, :block_type, details: @schema.fields).merge(creator: current_user)
   end
 end
diff --git a/lib/engines/content_object_store/app/models/concerns/content_object_store/has_authors.rb b/lib/engines/content_object_store/app/models/concerns/content_object_store/has_authors.rb
new file mode 100644
index 00000000000..c6c8f199ffb
--- /dev/null
+++ b/lib/engines/content_object_store/app/models/concerns/content_object_store/has_authors.rb
@@ -0,0 +1,10 @@
+module ContentObjectStore
+  module HasAuthors
+    extend ActiveSupport::Concern
+    include ContentObjectStore::HasCreator
+
+    included do
+      has_many :content_block_edition_authors, dependent: :destroy
+    end
+  end
+end
diff --git a/lib/engines/content_object_store/app/models/concerns/content_object_store/has_creator.rb b/lib/engines/content_object_store/app/models/concerns/content_object_store/has_creator.rb
new file mode 100644
index 00000000000..c83c92407a5
--- /dev/null
+++ b/lib/engines/content_object_store/app/models/concerns/content_object_store/has_creator.rb
@@ -0,0 +1,22 @@
+module ContentObjectStore
+  module HasCreator
+    extend ActiveSupport::Concern
+
+    included do
+      validates :creator, presence: true
+    end
+
+    def creator
+      content_block_edition_authors.first&.user
+    end
+
+    def creator=(user)
+      if new_record?
+        content_block_edition_author = content_block_edition_authors.first || content_block_edition_authors.build
+        content_block_edition_author.user = user
+      else
+        raise "author can only be set on new records"
+      end
+    end
+  end
+end
diff --git a/lib/engines/content_object_store/app/models/content_object_store/content_block_edition.rb b/lib/engines/content_object_store/app/models/content_object_store/content_block_edition.rb
index 73bf677cdbc..28bbeb85de9 100644
--- a/lib/engines/content_object_store/app/models/content_object_store/content_block_edition.rb
+++ b/lib/engines/content_object_store/app/models/content_object_store/content_block_edition.rb
@@ -1,4 +1,5 @@
 class ContentObjectStore::ContentBlockEdition < ApplicationRecord
   include ContentObjectStore::Identifiable
   include ContentObjectStore::ValidatesDetails
+  include ContentObjectStore::HasAuthors
 end
diff --git a/lib/engines/content_object_store/app/models/content_object_store/content_block_edition_author.rb b/lib/engines/content_object_store/app/models/content_object_store/content_block_edition_author.rb
new file mode 100644
index 00000000000..d7bfb5ba054
--- /dev/null
+++ b/lib/engines/content_object_store/app/models/content_object_store/content_block_edition_author.rb
@@ -0,0 +1,4 @@
+class ContentObjectStore::ContentBlockEditionAuthor < ApplicationRecord
+  belongs_to :content_block_edition
+  belongs_to :user
+end
diff --git a/lib/engines/content_object_store/features/step_definitions/content_object_store_steps.rb b/lib/engines/content_object_store/features/step_definitions/content_object_store_steps.rb
index 386895e5e05..e5edab31109 100644
--- a/lib/engines/content_object_store/features/step_definitions/content_object_store_steps.rb
+++ b/lib/engines/content_object_store/features/step_definitions/content_object_store_steps.rb
@@ -78,7 +78,12 @@
 Given("an email address content block has been created") do
   @content_blocks ||= []
   @email_address = "foo@example.com"
-  @content_block = create(:content_block_edition, :email_address, details: { email_address: @email_address })
+  @content_block = create(
+    :content_block_edition,
+    :email_address,
+    details: { email_address: @email_address },
+    creator: @user,
+  )
   @content_blocks.push(@content_block)
 end
 
@@ -113,6 +118,8 @@ def should_show_summary_details_for_email_address_content_block(content_block, e
   expect(page).to have_selector(".govuk-summary-list__value", text: content_block.document.title)
   expect(page).to have_selector(".govuk-summary-list__key", text: "Email address")
   expect(page).to have_selector(".govuk-summary-list__value", text: email_address)
+  expect(page).to have_selector(".govuk-summary-list__key", text: "Creator")
+  expect(page).to have_selector(".govuk-summary-list__value", text: @user.name)
 end
 
 Then("I should see errors for the required fields") do
diff --git a/lib/engines/content_object_store/test/components/content_block_edition/index/summary_card_component_test.rb b/lib/engines/content_object_store/test/components/content_block_edition/index/summary_card_component_test.rb
index 26b0db9fddd..e67b4d1616e 100644
--- a/lib/engines/content_object_store/test/components/content_block_edition/index/summary_card_component_test.rb
+++ b/lib/engines/content_object_store/test/components/content_block_edition/index/summary_card_component_test.rb
@@ -5,7 +5,13 @@ class ContentObjectStore::ContentBlockEdition::Index::SummaryCardComponentTest <
 
   test "it renders a content block as a summary card" do
     content_block_document = build(:content_block_document, :email_address)
-    content_block_edition = build(:content_block_edition, :email_address, id: 123, details: { foo: "bar", something: "else" }, content_block_document:)
+    content_block_edition = build(
+      :content_block_edition,
+      :email_address,
+      id: 123,
+      details: { foo: "bar", something: "else" },
+      content_block_document:, creator: build(:user)
+    )
 
     render_inline(ContentObjectStore::ContentBlockEdition::Index::SummaryCardComponent.new(content_block_edition:))
 
@@ -13,12 +19,14 @@ class ContentObjectStore::ContentBlockEdition::Index::SummaryCardComponentTest <
     assert_selector ".govuk-summary-card__action", count: 1
     assert_selector ".govuk-summary-card__action .govuk-link[href='#{content_object_store_content_block_edition_path(content_block_edition)}']"
 
-    assert_selector ".govuk-summary-list__row", count: 3
+    assert_selector ".govuk-summary-list__row", count: 4
     assert_selector ".govuk-summary-list__key", text: "Title"
     assert_selector ".govuk-summary-list__value", text: content_block_edition.title
     assert_selector ".govuk-summary-list__key", text: "Foo"
     assert_selector ".govuk-summary-list__value", text: "bar"
     assert_selector ".govuk-summary-list__key", text: "Something"
     assert_selector ".govuk-summary-list__value", text: "else"
+    assert_selector ".govuk-summary-list__key", text: "Creator"
+    assert_selector ".govuk-summary-list__value", text: content_block_edition.creator.name
   end
 end
diff --git a/lib/engines/content_object_store/test/components/content_block_edition/show/summary_list_component_test.rb b/lib/engines/content_object_store/test/components/content_block_edition/show/summary_list_component_test.rb
index 7509de21526..b7993c57569 100644
--- a/lib/engines/content_object_store/test/components/content_block_edition/show/summary_list_component_test.rb
+++ b/lib/engines/content_object_store/test/components/content_block_edition/show/summary_list_component_test.rb
@@ -2,15 +2,22 @@
 
 class ContentObjectStore::ContentBlockEdition::Show::SummaryListComponentTest < ViewComponent::TestCase
   test "renders a content block correctly" do
-    content_block_edition = build(:content_block_edition, :email_address, details: { foo: "bar", something: "else" })
+    content_block_edition = build(
+      :content_block_edition,
+      :email_address,
+      details: { foo: "bar", something: "else" },
+      creator: build(:user),
+    )
     render_inline(ContentObjectStore::ContentBlockEdition::Show::SummaryListComponent.new(content_block_edition:))
 
-    assert_selector ".govuk-summary-list__row", count: 3
+    assert_selector ".govuk-summary-list__row", count: 4
     assert_selector ".govuk-summary-list__key", text: "Title"
     assert_selector ".govuk-summary-list__value", text: content_block_edition.title
     assert_selector ".govuk-summary-list__key", text: "Foo"
     assert_selector ".govuk-summary-list__value", text: "bar"
     assert_selector ".govuk-summary-list__key", text: "Something"
     assert_selector ".govuk-summary-list__value", text: "else"
+    assert_selector ".govuk-summary-list__key", text: "Creator"
+    assert_selector ".govuk-summary-list__value", text: content_block_edition.creator.name
   end
 end
diff --git a/lib/engines/content_object_store/test/factories/content_block_edition.rb b/lib/engines/content_object_store/test/factories/content_block_edition.rb
index d8046b2d232..ec48d026d71 100644
--- a/lib/engines/content_object_store/test/factories/content_block_edition.rb
+++ b/lib/engines/content_object_store/test/factories/content_block_edition.rb
@@ -5,6 +5,7 @@
     updated_at { Time.zone.now.utc }
     block_type { "block_type" }
     schema { build(:content_block_schema) }
+    creator
 
     ContentObjectStore::ContentBlockSchema.valid_schemas.each do |type|
       trait type.to_sym do
diff --git a/lib/engines/content_object_store/test/integration/content_block_editions_test.rb b/lib/engines/content_object_store/test/integration/content_block_editions_test.rb
index 08512bb183d..07bf857dd40 100644
--- a/lib/engines/content_object_store/test/integration/content_block_editions_test.rb
+++ b/lib/engines/content_object_store/test/integration/content_block_editions_test.rb
@@ -38,23 +38,27 @@ class ContentBlockEditionsTest < ActionDispatch::IntegrationTest
 
     assert_changes -> { ContentObjectStore::ContentBlockDocument.count }, from: 0, to: 1 do
       assert_changes -> { ContentObjectStore::ContentBlockEdition.count }, from: 0, to: 1 do
-        post content_object_store.content_object_store_content_block_editions_path, params: {
-          something: "else",
-          content_object_store_content_block_edition: {
-            title:,
-            block_type:,
-            details:,
-          },
-        }
+        assert_changes -> { ContentObjectStore::ContentBlockEditionAuthor.count }, from: 0, to: 1 do
+          post content_object_store.content_object_store_content_block_editions_path, params: {
+            something: "else",
+            content_object_store_content_block_edition: {
+              title:,
+              block_type:,
+              details:,
+            },
+          }
+        end
       end
     end
 
     new_document = ContentObjectStore::ContentBlockDocument.find_by!(content_id: @content_id)
     new_edition = new_document.content_block_editions.first
+    new_author = ContentObjectStore::ContentBlockEditionAuthor.first
     assert_equal title, new_document.title
     assert_equal block_type, new_document.block_type
     assert_equal details, new_edition.details
     assert_equal new_edition.content_block_document_id, new_document.id
+    assert_equal new_edition.creator, new_author.user
   end
 
   test "#create posts the new edition to the Publishing API" do
diff --git a/lib/engines/content_object_store/test/unit/app/models/content_block_edition_test.rb b/lib/engines/content_object_store/test/unit/app/models/content_block_edition_test.rb
index 1f6751fa9f3..2b2c2d0cca9 100644
--- a/lib/engines/content_object_store/test/unit/app/models/content_block_edition_test.rb
+++ b/lib/engines/content_object_store/test/unit/app/models/content_block_edition_test.rb
@@ -9,6 +9,7 @@ class ContentObjectStore::ContentBlockEditionTest < ActiveSupport::TestCase
     @updated_at = Time.zone.local(2000, 12, 31, 23, 59, 59).utc
     @details = { "some_field" => "some_content" }
     @title = "Document title"
+    @creator = create(:user)
 
     @content_block_edition = build(
       :content_block_edition,
@@ -18,6 +19,7 @@ class ContentObjectStore::ContentBlockEditionTest < ActiveSupport::TestCase
       details: @details,
       title: @title,
       content_block_document: nil,
+      creator: @creator,
     )
   end
 
@@ -88,4 +90,17 @@ class ContentObjectStore::ContentBlockEditionTest < ActiveSupport::TestCase
     assert_invalid content_block_edition
     assert content_block_edition.errors.full_messages.include?("Title can't be blank")
   end
+
+  test "it adds a creator and first edition author for new records" do
+    @content_block_edition.save!
+    @content_block_edition.reload
+    assert_equal @content_block_edition.creator, @content_block_edition.content_block_edition_authors.first.user
+  end
+
+  test "#creator= raises an exception if called for a persisted record" do
+    @content_block_edition.save!
+    assert_raise RuntimeError do
+      @content_block_edition.creator = create(:user)
+    end
+  end
 end
diff --git a/lib/engines/content_object_store/test/unit/app/services/create_edition_service_test.rb b/lib/engines/content_object_store/test/unit/app/services/create_edition_service_test.rb
index 19ad561a831..3d62fd8d5b3 100644
--- a/lib/engines/content_object_store/test/unit/app/services/create_edition_service_test.rb
+++ b/lib/engines/content_object_store/test/unit/app/services/create_edition_service_test.rb
@@ -14,6 +14,7 @@ class ContentObjectStore::CreateEditionServiceTest < ActiveSupport::TestCase
           "foo" => "Foo text",
           "bar" => "Bar text",
         },
+        creator: build(:user),
       }
     end