diff --git a/docs/reference-guides/core-blocks.md b/docs/reference-guides/core-blocks.md
index b9a35e3fd5f51f..1d83564fe3c17c 100644
--- a/docs/reference-guides/core-blocks.md
+++ b/docs/reference-guides/core-blocks.md
@@ -339,7 +339,7 @@ Insert an image to make a visual statement. ([Source](https://github.com/WordPre
 
 -	**Name:** core/image
 -	**Category:** media
--	**Supports:** anchor, color (~~background~~, ~~text~~), filter (duotone)
+-	**Supports:** anchor, behaviors (lightbox), color (~~background~~, ~~text~~), filter (duotone)
 -	**Attributes:** align, alt, aspectRatio, caption, height, href, id, linkClass, linkDestination, linkTarget, rel, scale, sizeSlug, title, url, width
 
 ## Latest Comments
diff --git a/packages/block-library/src/image/block.json b/packages/block-library/src/image/block.json
index a360e595281267..005f322722d701 100644
--- a/packages/block-library/src/image/block.json
+++ b/packages/block-library/src/image/block.json
@@ -90,6 +90,9 @@
 	},
 	"supports": {
 		"anchor": true,
+		"behaviors": {
+			"lightbox": true
+		},
 		"color": {
 			"text": false,
 			"background": false