Patrick Stewart ... Professor Charles Xavier
Hugh Jackman ... Logan/Wolverine
Ian McKellen ... Eric Lensherr/Magneto
Halle Berry ... Storm/Ororo Munroe
Famke Janssen ... Jean Grey
James Marsden ... Scott Summers/Cyclops
Anna Paquin ... Rogue/Marie D'Ancanto
Rebecca Romijn ... Mystique/Grace (as Rebecca Romijn-Stamos)
Brian Cox ... William Stryker
Alan Cumming ... Kurt Wagner/Nightcrawler
Bruce Davison ... Senator Kelly
Aaron Stanford ... John Allerdyce/Pyro
Shawn Ashmore ... Bobby Drake/Iceman
Kelly Hu ... Yuriko Oyama/Deathstrike
Katie Stuart ... Kitty Pryde
Kea Wong ... Jubilee
Cotter Smith ... President McKenna
Chiara Zanni ... White House Tour Guide
Jackie A. Greenbank ... President's Secretary
Michael Soltis ... White House Checkpoint Agent
Michael David Simms ... Lead White House Agent
David Fabrizio ... Oval Office Agent Fabrizio
Roger R. Cross ... Oval Office Agent Cartwright
Richard Bradshaw ... Special Ops Agent
Bryce Hodgson ... Artie
Glen Curtis ... Museum Teenager #1
Greg Rikaart ... Museum Teenager #2
Shauna Kain ... Siryn
Ty Olsson ... Mitchell Laurio
Alfonso Quijada ... Federal Bldg. Cleaning Twin #1
Rene Quijada ... Federal Bldg. Cleaning Twin #2
Brad Loree ... Stryker at age 40
Sheri G. Feldman ... Augmentation Room Doctor
Connor Widdows ... Jones
Daniel Cudmore ... Colossus
Peter Wingfield ... Stryker Soldier Lyman
Charles Siegel ... Dr. Shaw
Steve Bacic ... Dr. Hank McCoy
Michael Reid MacKay ... Jason 143
James Kirk ... Ronny Drake
Jill Teed ... Madeline Drake
Alf Humphreys ... William Drake (as Alfred E. Humphreys)
Michasha Armstrong ... Plastic Prison Guard
Robert Hayley ... Cop
Mark Lukyn ... Cop #1, Lead Cop
Kendall Cross ... Cop #2
Keely Purvis ... Little Girl 143
Dylan Kussman ... Stryker Soldier Wilkins
Jason Whitmer ... Stryker Soldier Smith (as Jason S. Whitmer)
Aaron Pearl ... Stryker Soldier
Aaron Douglas ... Stryker Soldier #1
Colin Lawrence ... Stryker Soldier #2
Richard C. Burton ... Loading Bay Stryker Soldier #1
Michael Joycelyn ... Loading Bay Stryker Soldier #2
Nolan Funk ... Captured X-Kid
Devin Douglas Drewitz ... Captured X-Kid
Jermaine Lopez ... Captured X-Kid
Sideah Alladice ... Captured X-Kid
Kurt Max Runte ... Chief of Staff Abrahams
Benjamin Glenday ... Cameraman
Lori Stewart ... F-16 Fighter Pilot
Ted Friend ... News Reporter
Mi-Jung Lee ... News Reporter
Marrett Green ... News Reporter
Jill Krop ... News Reporter
Brian Peck ... News Reporter
Emily Hirst ... Ice Cream Girl (uncredited)
David Kaye ... TV Host (uncredited)
Blake Mawson ... X Kid #5 (uncredited)
Darren McGuire ... Stryker Soldier stabbed in foot by Logan (uncredited)
Newton Thomas Sigel ... Police Officer (uncredited)
Bryan Singer ... Security Officer in Magneto's Prison (uncredited)

Directed by ... Bryan Singer
Story by ... Zak Penn, David Hayter & Bryan Singer
Screenplay by ... Michael Dougherty, Dan Harris & David Hayter