9:02 AM PDT 5/19/2014 by Hilary Lewis
X-Men fans were seeing double on Monday when both the younger and older versions of Professor Xavier appeared on Good Morning America.
James McAvoy and Patrick Stewart each shared their thoughts on the other actor, with McAvoy revealing that he initially shaved his head when he learned he would be playing the younger version of Stewart's character.
"I had showed up on the first day of X-Men: First Class, and I had shaved my head because I wanted to check what it looked like about a month before we started shooting -- and it looked quite good -- and they were like, 'No, no, no, no, we want you to have long hair.' "