diff --git a/app/models/creator.rb b/app/models/creator.rb
index 0b42026c5..e50fd1579 100644
--- a/app/models/creator.rb
+++ b/app/models/creator.rb
@@ -27,6 +27,11 @@ def self.find_param(param)
     find_by!(slug: param)
   end
 
+  def summary_html
+    return unless caption || notes
+    "<section>#{"<header>#{caption}</header>" if caption}#{Kramdown::Document.new(notes).to_html.rstrip if notes}</section>"
+  end
+
   def to_activitypub_object
     {
       "@context": {
@@ -41,6 +46,7 @@ def to_activitypub_object
           "@type": "@string"
         }
       },
+      summary: summary_html,
       attributionDomains: [
         [Rails.application.default_url_options[:host], Rails.application.default_url_options[:port]].compact.join(":")
       ],
diff --git a/spec/factories/creator.rb b/spec/factories/creator.rb
index feb70e736..930c1c3c7 100644
--- a/spec/factories/creator.rb
+++ b/spec/factories/creator.rb
@@ -2,5 +2,7 @@
   factory :creator do
     sequence(:name) { |n| "Creator #{n}" }
     sequence(:public_id) { |n| "creator_#{n}" }
+    caption { Faker::Lorem.sentence }
+    notes { Faker::Lorem.paragraph }
   end
 end
diff --git a/spec/models/creator_spec.rb b/spec/models/creator_spec.rb
index 7ce8e75f8..0a9fe35b7 100644
--- a/spec/models/creator_spec.rb
+++ b/spec/models/creator_spec.rb
@@ -5,4 +5,26 @@
   it_behaves_like "Commentable"
   it_behaves_like "Caber::Object"
   it_behaves_like "Sluggable"
+
+  context "when generating an ActivityStreams representation" do
+    subject(:creator) { create(:creator) }
+
+    let(:ap) { creator.to_activitypub_object }
+
+    it "includes concrete type" do
+      expect(ap[:concreteType]).to eq "Creator"
+    end
+
+    it "includes attributionDomain" do
+      expect(ap[:attributionDomains]).to eq ["localhost:3214"]
+    end
+
+    it "includes caption in summary" do
+      expect(ap[:summary]).to include creator.caption
+    end
+
+    it "includes notes in summary" do
+      expect(ap[:summary]).to include creator.notes
+    end
+  end
 end