Picture of Lynda Carter

From IMDb : The son of one of her stunt doubles, Jeannie Epper, told his classmates that his mother was Lynda's stunt double on the series Wonder Woman (1975), but they didn't believe him, not even after he showed them a picture of his mother in the Wonder Woman costume from the set. When Lynda herself found out about this, she invited the boy's class to the set so they could see Jeannie herself in action.