Sir Patrick Stewart lost 21 pounds to play Charles Xavier as elderly and sick. Stewart claimed that he had a steady weight since he was a teenager and had never deliberately lost weight before. Hugh Jackman genuinely held Stewart in all the scenes of Wolverine carrying Professor Xavier.In the closing credits, the words "Alpha Flight" appears under Camera Units. Alpha Flight is the name of a Canadian superhero group that Wolverine was originally a member of in the comics. 