WordPress does not allow you to add an author avatar by default. Install Author Photo to enable users to add their own avatars.
Display any author photo within a post or directly inside WordPress template files with flexible custom shortcodes.
Author Photo automatically checks Gravatar for a user image and displays it if an author does not have a photo.
Select the size of an author photo when you want to display it.
Choose to show the user's name and bio below their photo.
Choose alignment, text wrapping, and even set CSS classes.