Have you ever been mistaken for a celebrity or did you ever?

[MyButtCanDoMagic]

At any time during your life, have you ever been mistaken for a celebrity, either an actor, singer or sports personality? What did you do, did you pretend to be that person and sign autographs or tell the person they were making a mistake? Or did you ever get a bit part on a tv show or did you see yourself in a crowd scene in a movie?