Patrick Stewart (Charles Xavier / Professor X), Hugh Jackman (Logan / Wolverine), Ian McKellen (Eric Lehnsherr / Magneto), Anna Paquin (Anna Marie / Rogue), Halle Berry (Ororo Munroe / Storm), Famke Janssen (Jean Grey), James Marsden (Scott Summers / Cyclops) more..., Bruce Davison (Senator Kelly), Rebecca Romijn (Raven Darkholme / Mystique), Ray Park (Mortimer Toynbee / Toad), Tyler Mane (Victor Creed / Sabretooth), Shawn Ashmore (Bobby Drake / Iceman), Matthew Sharp (Henry Gyrich), Brett Morris (Young Magneto), Rhona Shekter (Magneto's Mother), Kenneth McGregor (Magneto's Father), Shawn Roberts (Rogue's Boyfriend), Donna Goodhand (Rogue's Mother), John Nelles (Rogue's Father), George Buza (Trucker), Darren McGuire (Contender), Carson Manning (Waterboy #1), Scott Leva (Waterboy #2), Aron Tager (Emcee), Kevin Rushton (Stu), Doug Lennox (Bartender), David Nichols (Newscaster #1), Malcolm Nefsky (Stu's Buddy), Sumela Kay (Katherine "Kitty" Pryde / Shadowcat), Katrina Florece (Jubilation Lee / Jubilee), Alex Burton (John Allerdyce / Pyro), Quinn Wright (Lily Pond Kid), Daniel Magder (Boy on Raft), Matt Weinberg (Tommy), Madison Lanc (Tommy's Sister), Stan Lee (Hot Dog Vendor), Marsha Graham (Newscaster #2), Amy Leland (Cerebro), Adam Robitel (Guy on Line), David Brown (Lead Cop) and others.

Ke Huy Quan (Translator), Ralph Winter (Producer), Steven Rosenblum (Editor), Bob Ringwood (Costume Consultant), Roger Mussenden (Casting), Richard Donner (Executive Producer), Lauren Shuler Donner (Producer) more..., Steve Boeddeker (Sound Designer), Stan Lee (Executive Producer), Avi Arad (Executive Producer), Kevin Feige (Associate Producer), Michael Kamen (Original Music Composer), Michael Kamen (Conductor), Craig Berkey (Sound Designer), John Wright (Editor), Bryan Singer (Story), Newton Thomas Sigel (Director of Photography), Louise Mingenbach (Costume Design), Conrad E. Palmisano (Second Unit Director), Tim Monich (Dialect Coach), Greg Papalia (Art Direction), Kevin Stitt (Editor), John Myhre (Production Design), Tom DeSanto (Executive Producer), Tom DeSanto (Story), Tamara Deverell (Art Direction), James Edward Ferrell Jr. (Set Decoration), Corey Yuen (Action Director), Paul D. Austerberry (Art Direction), Bill Todman Jr. (Co-Producer), Joel Simon (Co-Producer), R.J. Kizer (Supervising ADR Editor), David Betancourt (Foley Mixer), David Hayter (Screenplay), Todd Busch (Additional Editing), Troy Brenna (Stunt Double), Lloyd Adams (Stunts), Steve Burg (Concept Artist), John Coven (Storyboard Artist), Ross T. Fanger (Unit Production Manager) and others.