When a cure is found to treat mutations, lines are drawn amongst the X-Men led by Professor Charles Xavier, and Magneto's Brotherhood of Mutants.

Patrick Stewart
Professor Charles Xavier

Famke Janssen
Jean Grey / Phoenix

Anna Paquin
Marie / Rogue

Kelsey Grammer
Dr. Henry 'Hank' McCoy / Beast

James Marsden
Scott Summers / Cyclops