diff --git a/packages/components/src/combobox-control/README.md b/packages/components/src/combobox-control/README.md
index 4089cf9c56e9b5..7a11c8b95fe2e9 100644
--- a/packages/components/src/combobox-control/README.md
+++ b/packages/components/src/combobox-control/README.md
@@ -39,6 +39,7 @@ function MyComboboxControl() {
 			label="Font Size"
 			value={ fontSize }
 			onChange={ setFontSize }
+			isLoading={ isLoading }
 			options={ filteredOptions }
 			onFilterValueChange={ ( inputValue ) =>
 				setFilteredOptions(
@@ -112,13 +113,20 @@ If the control is clicked, the dropdown will expand regardless of this prop.
 -   Required: No
 -   Default: `true`
 
-### placeholder
+#### placeholder
 
 If passed, the combobox input will show a placeholder string if no values are present.
 
 -   Type: `string`
 -   Required: No
 
+#### isLoading
+
+Show a spinner (and hide the suggestions dropdown) while data about the matching suggestions (ie the `options` prop) is loading
+
+-   Type: `Boolean`
+-   Required: No
+
 #### __experimentalRenderItem
 
 Custom renderer invoked for each option in the suggestion list. The render prop receives as its argument an object containing, under the `item` key, the single option's data (directly from the array of data passed to the `options` prop).
diff --git a/packages/components/src/combobox-control/index.tsx b/packages/components/src/combobox-control/index.tsx
index 28510c8653d02e..9c6bd2a4d75dd2 100644
--- a/packages/components/src/combobox-control/index.tsx
+++ b/packages/components/src/combobox-control/index.tsx
@@ -35,6 +35,7 @@ import type { TokenInputProps } from '../form-token-field/types';
 import { useDeprecated36pxDefaultSizeProp } from '../utils/use-deprecated-props';
 import { withIgnoreIMEEvents } from '../utils/with-ignore-ime-events';
 import { maybeWarnDeprecated36pxSize } from '../utils/deprecated-36px-size';
+import Spinner from '../spinner';
 
 const noop = () => {};
 
@@ -126,6 +127,7 @@ function ComboboxControl( props: ComboboxControlProps ) {
 		help,
 		allowReset = true,
 		className,
+		isLoading = false,
 		messages = {
 			selected: __( 'Item selected.' ),
 		},
@@ -362,6 +364,7 @@ function ComboboxControl( props: ComboboxControlProps ) {
 								onChange={ onInputChange }
 							/>
 						</FlexBlock>
+						{ isLoading && <Spinner /> }
 						{ allowReset && (
 							<Button
 								size="small"
@@ -375,7 +378,7 @@ function ComboboxControl( props: ComboboxControlProps ) {
 							/>
 						) }
 					</InputWrapperFlex>
-					{ isExpanded && (
+					{ isExpanded && ! isLoading && (
 						<SuggestionsList
 							instanceId={ instanceId }
 							// The empty string for `value` here is not actually used, but is
diff --git a/packages/components/src/combobox-control/stories/index.story.tsx b/packages/components/src/combobox-control/stories/index.story.tsx
index f033742a336623..19eecea54f6890 100644
--- a/packages/components/src/combobox-control/stories/index.story.tsx
+++ b/packages/components/src/combobox-control/stories/index.story.tsx
@@ -124,6 +124,7 @@ WithCustomRenderItem.args = {
 			</div>
 		);
 	},
+	isLoading: true,
 };
 
 /**
diff --git a/packages/components/src/combobox-control/types.ts b/packages/components/src/combobox-control/types.ts
index 470b38c35e2c8a..8ecdad501e6b8f 100644
--- a/packages/components/src/combobox-control/types.ts
+++ b/packages/components/src/combobox-control/types.ts
@@ -86,4 +86,10 @@ export type ComboboxControlProps = Pick<
 	 * If passed, the combobox input will show a placeholder string if no values are present.
 	 */
 	placeholder?: string;
+
+	/**
+	 * Show a spinner (and hide the suggestions dropdown) while data
+	 * about the matching suggestions (ie the `options` prop) is loading
+	 */
+	isLoading?: boolean;
 };
diff --git a/packages/editor/src/components/post-author/combobox.js b/packages/editor/src/components/post-author/combobox.js
index 867eca7947976a..9cc6e01f5b82ce 100644
--- a/packages/editor/src/components/post-author/combobox.js
+++ b/packages/editor/src/components/post-author/combobox.js
@@ -17,7 +17,8 @@ export default function PostAuthorCombobox() {
 	const [ fieldValue, setFieldValue ] = useState();
 
 	const { editPost } = useDispatch( editorStore );
-	const { authorId, authorOptions } = useAuthorsQuery( fieldValue );
+	const { authorId, authorOptions, isLoading } =
+		useAuthorsQuery( fieldValue );
 
 	/**
 	 * Handle author selection.
@@ -51,6 +52,7 @@ export default function PostAuthorCombobox() {
 			onChange={ handleSelect }
 			allowReset={ false }
 			hideLabelFromVision
+			isLoading={ isLoading }
 		/>
 	);
 }
diff --git a/packages/editor/src/components/post-author/hook.js b/packages/editor/src/components/post-author/hook.js
index f251eba79e1806..28c4c126547b82 100644
--- a/packages/editor/src/components/post-author/hook.js
+++ b/packages/editor/src/components/post-author/hook.js
@@ -14,9 +14,9 @@ import { store as editorStore } from '../../store';
 import { AUTHORS_QUERY, BASE_QUERY } from './constants';
 
 export function useAuthorsQuery( search ) {
-	const { authorId, authors, postAuthor } = useSelect(
+	const { authorId, authors, postAuthor, isLoading } = useSelect(
 		( select ) => {
-			const { getUser, getUsers } = select( coreStore );
+			const { getUser, getUsers, isResolving } = select( coreStore );
 			const { getEditedPostAttribute } = select( editorStore );
 			const _authorId = getEditedPostAttribute( 'author' );
 			const query = { ...AUTHORS_QUERY };
@@ -30,6 +30,7 @@ export function useAuthorsQuery( search ) {
 				authorId: _authorId,
 				authors: getUsers( query ),
 				postAuthor: getUser( _authorId, BASE_QUERY ),
+				isLoading: isResolving( 'getUsers', [ query ] ),
 			};
 		},
 		[ search ]
@@ -68,5 +69,5 @@ export function useAuthorsQuery( search ) {
 		return [ ...currentAuthor, ...fetchedAuthors ];
 	}, [ authors, postAuthor ] );
 
-	return { authorId, authorOptions, postAuthor };
+	return { authorId, authorOptions, postAuthor, isLoading };
 }