Hugh Jackman ... Logan/Wolverine
Halle Berry ... Ororo Munroe/Storm
Ian McKellen ... Eric Lehnsherr/Magneto
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
Rebecca Romijn ... Raven Darkholme/Mystique
Shawn Ashmore ... Bobby Drake/Iceman
Aaron Stanford ... John Allerdyce/Pyro
Vinnie Jones ... Cain Marko/Juggernaut
Ellen Page ... Kitty Pryde
Daniel Cudmore ... Peter Rasputin/Colossus
Ben Foster ... Warren Worthington III/Angel
Michael Murphy ... Warren Worthington II
Dania Ramirez ... Callisto
Shohreh Aghdashloo ... Dr. Kavita Rao
Josef Sommer ... The President
Bill Duke ... Trask
Eric Dane ... Multiple Man
Desiree Zurowski ... Mrs. Grey
Adrian Hough ... Mr. Grey
Haley Ramm ... Young Jean Grey
Chris Claremont ... Lawnmower Man
Stan Lee ... Waterhose Man
Cayden Boyd ... Young Angel
Tanya Newbould ... Dr. McCoy's Assistant
Anthony Heald ... FBI Mystique Interrogator
Cameron Bright ... Jimmy/Leech
Connor Widdows ... Jones
Kea Wong ... Jubilation Lee/Jubilee
Shauna Kain ... Theresa Rourke Cassidy/Siryn
Luke Pohl ... Flea
Julian Richings ... Mutant Theatre Organizer
Lloyd Adams ... Lizard Man
Richard Yee ... Little Phat
Via Saleaumua ... Phat
Mei Melançon ... Psylocke
Omahyra ... Arclight
Clayton Dean Watmough ... Glob Herman (as Clayton Watmough)
Ken Leung ... Kid Omega
Julian Christopher ... Prison Truck Guard #1 (as Julian D. Christopher)
Brad Kelly ... Prison Truck Guard #2
Makenzie Vega ... Prison Truck Little Girl
Mi-Jung Lee ... Newscaster (as Mi Jung Lee)
Benita Ha ... Worthington Technician
Ron James ... Prison Truck Driver
R. Lee Ermey ... Sergeant (voice)
Lance Gibson ... Spike
Aaron Pearl ... Team Leader
Chelah Horsdal ... Minivan Mother
John Pyper-Ferguson ... Minivan Father
Brenna O'Brien ... Minivan Daughter
Justin Callan ... Minivan Son #1
Alex Ferris ... Minivan Son #2
Peter Kawasaki ... Photographer
Ron Blecker ... Commander (as Ronald Blecker)
Emy Aneke ... Alcatraz Lieutenant
David Colin Smith ... Omega Mutie
Ed Appleby ... Soldier (uncredited)
Zoltan Buday ... Mutant Cure (uncredited)
Denis Corbett ... School Gardener (uncredited)
Christopher Fosh ... Husband at BBQ (uncredited)
Donna Goodhand ... Mother (uncredited)
Robert Hayley ... Captain (uncredited)
Mark Helfrich ... Ash Man (uncredited)
Bryce Hodgson ... Artie (uncredited)
Alexa Karter ... Civilian (uncredited)
Ryan King ... X-Student (uncredited)
Dan McPeake ... Kid at Funeral (uncredited)
Olivia Williams ... Dr. Moira MacTaggart (uncredited)
Alexandra Zhang ... Student (uncredited)

Directed by ... Brett Ratner
Written by ... Simon Kinberg & Zak Penn