diff --git a/CHANGELOG.md b/CHANGELOG.md
index a481ee66b..acf134e06 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - OTP builds are now built on erlang OTP26
 - The base Phoenix framework is now updated to 1.7
 - An `outbox` field has been added to actor profiles to comply with AP spec
+- User profile backgrounds do now federate with other Akkoma instances and Sharkey
 
 ## Fixed
 - Documentation issue in which a non-existing nginx file was referenced
diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index 35f416e6c..8449af620 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -382,6 +382,10 @@ def banner_url(user, options \\ []) do
     do_optional_url(user.banner, "#{Endpoint.url()}/images/banner.png", options)
   end
 
+  def background_url(user) do
+    do_optional_url(user.background, nil, no_default: true)
+  end
+
   defp do_optional_url(field, default, options) do
     case field do
       %{"url" => [%{"href" => href} | _]} when is_binary(href) ->
@@ -466,6 +470,7 @@ def remote_user_changeset(struct \\ %User{local: false}, params) do
         :avatar,
         :ap_enabled,
         :banner,
+        :background,
         :is_locked,
         :last_refreshed_at,
         :uri,
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index e4c626d36..4a8ce2d3d 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -1603,6 +1603,7 @@ defp object_to_user_data(data, additional) do
       uri: get_actor_url(data["url"]),
       ap_enabled: true,
       banner: normalize_image(data["image"]),
+      background: normalize_image(data["backgroundUrl"]),
       fields: fields,
       emoji: emojis,
       is_locked: is_locked,
diff --git a/lib/pleroma/web/activity_pub/views/user_view.ex b/lib/pleroma/web/activity_pub/views/user_view.ex
index d6d62a9a4..fe70022f1 100644
--- a/lib/pleroma/web/activity_pub/views/user_view.ex
+++ b/lib/pleroma/web/activity_pub/views/user_view.ex
@@ -112,6 +112,8 @@ def render("user.json", %{user: user}) do
     }
     |> Map.merge(maybe_make_image(&User.avatar_url/2, "icon", user))
     |> Map.merge(maybe_make_image(&User.banner_url/2, "image", user))
+    # Yes, the key is named ...Url eventhough it is a whole 'Image' object
+    |> Map.merge(maybe_insert_image("backgroundUrl", User.background_url(user)))
     |> Map.merge(Utils.make_json_ld_header())
   end
 
@@ -287,7 +289,12 @@ def collection(collection, iri, page, show_items \\ true, total \\ nil) do
   end
 
   defp maybe_make_image(func, key, user) do
-    if image = func.(user, no_default: true) do
+    image = func.(user, no_default: true)
+    maybe_insert_image(key, image)
+  end
+
+  defp maybe_insert_image(key, image) do
+    if image do
       %{
         key => %{
           "type" => "Image",
diff --git a/test/pleroma/web/activity_pub/side_effects_test.exs b/test/pleroma/web/activity_pub/side_effects_test.exs
index 80714b1db..28a591d3c 100644
--- a/test/pleroma/web/activity_pub/side_effects_test.exs
+++ b/test/pleroma/web/activity_pub/side_effects_test.exs
@@ -155,7 +155,13 @@ test "it blocks but does not unfollow if the relevant setting is set", %{
       user = insert(:user, local: false)
 
       {:ok, update_data, []} =
-        Builder.update(user, %{"id" => user.ap_id, "type" => "Person", "name" => "new name!"})
+        Builder.update(user, %{
+          "id" => user.ap_id,
+          "type" => "Person",
+          "name" => "new name!",
+          "icon" => %{"type" => "Image", "url" => "https://example.org/icon.png"},
+          "backgroundUrl" => %{"type" => "Image", "url" => "https://example.org/bg.jxl"}
+        })
 
       {:ok, update, _meta} = ActivityPub.persist(update_data, local: true)
 
@@ -165,7 +171,10 @@ test "it blocks but does not unfollow if the relevant setting is set", %{
     test "it updates the user", %{user: user, update: update} do
       {:ok, _, _} = SideEffects.handle(update)
       user = User.get_by_id(user.id)
+
       assert user.name == "new name!"
+      assert [%{"href" => "https://example.org/icon.png"}] = user.avatar["url"]
+      assert [%{"href" => "https://example.org/bg.jxl"}] = user.background["url"]
     end
 
     test "it uses a given changeset to update", %{user: user, update: update} do
diff --git a/test/pleroma/web/activity_pub/views/user_view_test.exs b/test/pleroma/web/activity_pub/views/user_view_test.exs
index ef1bd4fde..abe91cdea 100644
--- a/test/pleroma/web/activity_pub/views/user_view_test.exs
+++ b/test/pleroma/web/activity_pub/views/user_view_test.exs
@@ -58,16 +58,19 @@ test "Does not add an avatar image if the user hasn't set one" do
     result = UserView.render("user.json", %{user: user})
     refute result["icon"]
     refute result["image"]
+    refute result["backgroundUrl"]
 
     user =
       insert(:user,
         avatar: %{"url" => [%{"href" => "https://someurl"}]},
-        banner: %{"url" => [%{"href" => "https://somebanner"}]}
+        banner: %{"url" => [%{"href" => "https://somebanner"}]},
+        background: %{"url" => [%{"href" => "https://somebackground"}]}
       )
 
     result = UserView.render("user.json", %{user: user})
     assert result["icon"]["url"] == "https://someurl"
     assert result["image"]["url"] == "https://somebanner"
+    assert result["backgroundUrl"]["url"] == "https://somebackground"
   end
 
   test "renders an invisible user with the invisible property set to true" do