X-Men star James McAvoy was a guest on The Graham Norton Show this evening, along with his Victor Frankenstein co-star Daniel Radcliffe (Harry Potter), and was asked about Professor Charles Xavier losing his hair in X-Men: Apocalypse.

“Is there a good reason for why he goes bald or is it really dull?" Norton asked (via Bleeding Cool).

“He ends up going through something so horrible and painful that he literally half pulls his hair out half… it falls out,” McAvoy replied. “Maybe or maybe not”

Check out the video below to listen to Radcliffe and McAvoy recount rare instances in which their fans were rude to them.

X-Men: Apocalypse is being directed by Bryan Singer (X-Men: Days of Future Past), based on a script written by Simon Kinberg (Fantastic Four). The cast includes Jennifer Lawrence, Olivia Munn, Rose Byrne, Michael Fassbender, Sophie Turner, Oscar Isaac, Kodi Smit-McPhee, Nicholas Hoult, Evan Peters, James McAvoy, Tye Sheridan, Alexandra Shipp, Lucas Till, Ben Hardy, Josh Helman and Lana Condor.

X-Men: Apocalypse hits theaters May 27, 2016.