diff --git a/packages/block-library/src/post-author-name/edit.js b/packages/block-library/src/post-author-name/edit.js
index b4afb9a979949..2b4bb0709356b 100644
--- a/packages/block-library/src/post-author-name/edit.js
+++ b/packages/block-library/src/post-author-name/edit.js
@@ -13,7 +13,7 @@ import {
 	useBlockProps,
 } from '@wordpress/block-editor';
 import { useSelect } from '@wordpress/data';
-import { __ } from '@wordpress/i18n';
+import { __, sprintf } from '@wordpress/i18n';
 import { store as coreStore } from '@wordpress/core-data';
 import { PanelBody, ToggleControl } from '@wordpress/components';
 
@@ -22,9 +22,10 @@ function PostAuthorNameEdit( {
 	attributes: { textAlign, isLink, linkTarget },
 	setAttributes,
 } ) {
-	const { authorName } = useSelect(
+	const { authorName, supportsAuthor } = useSelect(
 		( select ) => {
-			const { getEditedEntityRecord, getUser } = select( coreStore );
+			const { getEditedEntityRecord, getUser, getPostType } =
+				select( coreStore );
 			const _authorId = getEditedEntityRecord(
 				'postType',
 				postType,
@@ -33,6 +34,8 @@ function PostAuthorNameEdit( {
 
 			return {
 				authorName: _authorId ? getUser( _authorId ) : null,
+				supportsAuthor:
+					getPostType( postType )?.supports?.author ?? false,
 			};
 		},
 		[ postType, postId ]
@@ -90,7 +93,17 @@ function PostAuthorNameEdit( {
 					) }
 				</PanelBody>
 			</InspectorControls>
-			<div { ...blockProps }> { displayAuthor } </div>
+			<div { ...blockProps }>
+				{ supportsAuthor
+					? displayAuthor
+					: sprintf(
+							// translators: %s: Name of the post type e.g: "post".
+							__(
+								'This post type (%s) does not support the author.'
+							),
+							postType
+					  ) }
+			</div>
 		</>
 	);
 }
diff --git a/packages/block-library/src/post-author-name/index.php b/packages/block-library/src/post-author-name/index.php
index effc83962a354..243d78ca70129 100644
--- a/packages/block-library/src/post-author-name/index.php
+++ b/packages/block-library/src/post-author-name/index.php
@@ -26,6 +26,10 @@ function render_block_core_post_author_name( $attributes, $content, $block ) {
 		return '';
 	}
 
+	if ( ! post_type_supports( $block->context['postType'], 'author' ) ) {
+		return '';
+	}
+
 	$author_name = get_the_author_meta( 'display_name', $author_id );
 	if ( isset( $attributes['isLink'] ) && $attributes['isLink'] ) {
 		$author_name = sprintf( '<a href="%1$s" target="%2$s" class="wp-block-post-author-name__link">%3$s</a>', get_author_posts_url( $author_id ), esc_attr( $attributes['linkTarget'] ), $author_name );
diff --git a/packages/block-library/src/post-author/edit.js b/packages/block-library/src/post-author/edit.js
index 6186b0d052e8a..dd2b3aa617548 100644
--- a/packages/block-library/src/post-author/edit.js
+++ b/packages/block-library/src/post-author/edit.js
@@ -21,7 +21,7 @@ import {
 	__experimentalVStack as VStack,
 } from '@wordpress/components';
 import { useSelect, useDispatch } from '@wordpress/data';
-import { __ } from '@wordpress/i18n';
+import { __, sprintf } from '@wordpress/i18n';
 import { store as coreStore } from '@wordpress/core-data';
 
 const minimumUsersForCombobox = 25;
@@ -38,9 +38,9 @@ function PostAuthorEdit( {
 	setAttributes,
 } ) {
 	const isDescendentOfQueryLoop = Number.isFinite( queryId );
-	const { authorId, authorDetails, authors } = useSelect(
+	const { authorId, authorDetails, authors, supportsAuthor } = useSelect(
 		( select ) => {
-			const { getEditedEntityRecord, getUser, getUsers } =
+			const { getEditedEntityRecord, getUser, getUsers, getPostType } =
 				select( coreStore );
 			const _authorId = getEditedEntityRecord(
 				'postType',
@@ -52,6 +52,8 @@ function PostAuthorEdit( {
 				authorId: _authorId,
 				authorDetails: _authorId ? getUser( _authorId ) : null,
 				authors: getUsers( AUTHORS_QUERY ),
+				supportsAuthor:
+					getPostType( postType )?.supports?.author ?? false,
 			};
 		},
 		[ postType, postId ]
@@ -97,6 +99,18 @@ function PostAuthorEdit( {
 	const showAuthorControl =
 		!! postId && ! isDescendentOfQueryLoop && authorOptions.length > 0;
 
+	if ( ! supportsAuthor ) {
+		return (
+			<div { ...blockProps }>
+				{ sprintf(
+					// translators: %s: Name of the post type e.g: "post".
+					__( 'This post type (%s) does not support the author.' ),
+					postType
+				) }
+			</div>
+		);
+	}
+
 	return (
 		<>
 			<InspectorControls>
diff --git a/packages/block-library/src/post-author/index.php b/packages/block-library/src/post-author/index.php
index faf894d997d73..2d01de508b94a 100644
--- a/packages/block-library/src/post-author/index.php
+++ b/packages/block-library/src/post-author/index.php
@@ -26,6 +26,10 @@ function render_block_core_post_author( $attributes, $content, $block ) {
 		return '';
 	}
 
+	if ( ! post_type_supports( $block->context['postType'], 'author' ) ) {
+		return '';
+	}
+
 	$avatar = ! empty( $attributes['avatarSize'] ) ? get_avatar(
 		$author_id,
 		$attributes['avatarSize']