diff --git a/docs/api-reference/expressions_cat.md b/docs/api-reference/expressions_cat.md
new file mode 100644
index 000000000..25a85cd09
--- /dev/null
+++ b/docs/api-reference/expressions_cat.md
@@ -0,0 +1,9 @@
+# `narwhals.Expr.cat`
+
+::: narwhals.expression.ExprCatNamespace
+    handler: python
+    options:
+      members:
+        - get_categories
+      show_source: false
+      show_bases: false
diff --git a/docs/api-reference/series_cat.md b/docs/api-reference/series_cat.md
new file mode 100644
index 000000000..55dc6e634
--- /dev/null
+++ b/docs/api-reference/series_cat.md
@@ -0,0 +1,9 @@
+# `narwhals.Series.cat`
+
+::: narwhals.series.SeriesStringNamespace
+    handler: python
+    options:
+      members:
+        - get_categories
+      show_source: false
+      show_bases: false