Frank Oz was 36 in An American Werewolf in London when he played the character 'Mr. Collins / Miss Piggy (archive footage)'.
That was over 43 years ago in 1981.
Today he is 79, and has starred in 130 movies in total, 99 of those since An American Werewolf in London was released.
In An American Werewolf in London, I think Frank Oz looks: