diff --git a/README.rst b/README.rst
index 7a72b03ec..9a2e04ccc 100644
--- a/README.rst
+++ b/README.rst
@@ -22,6 +22,19 @@ marshmallow: simplified object serialization
 
 **marshmallow** is an ORM/ODM/framework-agnostic library for converting complex datatypes, such as objects, to and from native Python datatypes.
 
+Sponsor Message
+===============
+
+*Input an OpenAPI spec to generate API docs that look as good as Stripe's. Request a preview of your docs on Fern* `here <https://form.typeform.com/to/bShdJw7z>`_.
+
+.. image:: https://github.com/user-attachments/assets/551997da-6d0c-4d73-85f3-6fb1240e9635
+    :target: https://form.typeform.com/to/bShdJw7z
+    :align: center
+    :alt: Fern logo
+
+Example
+=======
+
 .. code-block:: python
 
     from datetime import date
diff --git a/docs/_static/css/sponsor-message.css b/docs/_static/css/sponsor-message.css
new file mode 100644
index 000000000..0efffa520
--- /dev/null
+++ b/docs/_static/css/sponsor-message.css
@@ -0,0 +1,15 @@
+/* Override alabaster's admonition styling, which we used for sponsored messages */
+
+div.admonition-sponsor-message p.admonition-title {
+  font-size: 18px;
+  font-style: normal;
+}
+
+p.admonition-title::after  {
+  content: "";
+}
+
+div.admonition-sponsor-message p {
+  font-size: 14px;
+  font-style: italic;
+}
diff --git a/docs/conf.py b/docs/conf.py
index 8075b137e..5e02fe504 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -36,7 +36,7 @@
 html_theme_path = [alabaster.get_path()]
 html_theme = "alabaster"
 html_static_path = ["_static"]
-html_css_files = ["css/versionwarning.css"]
+html_css_files = ["css/versionwarning.css", "css/sponsor-message.css"]
 templates_path = ["_templates"]
 html_show_sourcelink = False
 
diff --git a/docs/index.rst b/docs/index.rst
index 0da06a6b1..1b6e50b83 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -6,6 +6,15 @@ marshmallow: simplified object serialization
 
 Release v\ |version|. (:doc:`Changelog <changelog>`)
 
+.. admonition:: Sponsor Message
+
+    Input an OpenAPI spec to generate API docs that look as good as Stripe's. Request a preview of your docs on Fern `here <https://form.typeform.com/to/bShdJw7z>`_.
+
+    .. image:: https://github.com/user-attachments/assets/551997da-6d0c-4d73-85f3-6fb1240e9635
+        :target: https://form.typeform.com/to/bShdJw7z
+        :align: center
+        :alt: Fern logo
+
 .. include:: about.rst.inc
 
 Upgrading from an older version?