One of the key defining aspects of Professor X is that he’s bald. It’s a bit shallow, but yes. When people say Professor X, you imagine a bald man on a floating chair. In the first two films in the rebooted X-Men series, James McAvoy managed to work the role effectively despite sporting a full head of hair, mainly because he’s portraying Charlex Xavier in his heady…erm…younger days and because you really can’t find any fault with his acting skill.
However, times may be about to change and we might see McAvoy portray a bald Xavier. The info came from the actor himself, who revealed that he’s portraying an older version in X-Men: Apocalypse:
“I’ll be older in this one,” explains McAvoy. “I think I’m losing my hair finally. And, yeah, that’s kind of all I know.”
“I got an email from the [producer/writer Simon Kinberg] who informed me he was getting dead excited about stuff, but he didn’t want to divulge anything for a couple of weeks, so I really don’t know.”