diff --git a/packages/block-library/src/post-excerpt/edit.js b/packages/block-library/src/post-excerpt/edit.js
index 05aaf543b5919..64470d583583a 100644
--- a/packages/block-library/src/post-excerpt/edit.js
+++ b/packages/block-library/src/post-excerpt/edit.js
@@ -19,6 +19,7 @@ import {
 import { PanelBody, ToggleControl, RangeControl } from '@wordpress/components';
 import { __, _x } from '@wordpress/i18n';
 import { useSelect } from '@wordpress/data';
+import { applyFilters } from '@wordpress/hooks';
 
 /**
  * Internal dependencies
@@ -150,7 +151,8 @@ export default function PostExcerptEditor( {
 	 * the raw and the rendered excerpt depending on which is being used.
 	 */
 	const rawOrRenderedExcerpt = (
-		rawExcerpt || strippedRenderedExcerpt
+		applyFilters( 'the_excerpt', undefined, rawExcerpt ) ||
+		strippedRenderedExcerpt
 	).trim();
 
 	let trimmedExcerpt = '';
diff --git a/packages/block-library/src/post-excerpt/index.php b/packages/block-library/src/post-excerpt/index.php
index c8882b4062ac0..8cb9a48b8c11b 100644
--- a/packages/block-library/src/post-excerpt/index.php
+++ b/packages/block-library/src/post-excerpt/index.php
@@ -27,7 +27,8 @@ function render_block_core_post_excerpt( $attributes, $content, $block ) {
 	* wp_trim_words is used instead.
 	*/
 	$excerpt_length = $attributes['excerptLength'];
-	$excerpt        = get_the_excerpt( $block->context['postId'] );
+
+	$excerpt        = apply_filters( 'the_excerpt', get_the_excerpt( $block->context['postId'] ) );
 	if ( isset( $excerpt_length ) ) {
 		$excerpt = wp_trim_words( $excerpt, $excerpt_length );
 	}