X-Men Origins : Wolverine

Cast
Hugh Jackman as Logan / Wolverine: The mutant and future X-Men member. Jackman, who played Wolverine in the previous films, has also become producer of the film via his company Seed Productions, and earned $20 million for the film. Jackman underwent a high intensity weight training regimen to bulk up for his role. He changed the program to shock the body into change and also performed cardiovascular workouts. Jackman noted no digital touches were applied to his physique in a shot of him rising from the tank within which Wolverine has his bones coated in adamantium.
Troye Sivan as James Howlett: Casting directors cast Sivan as the young Wolverine after seeing him sing at the Channel Seven Perth Telethon, and he was accepted after sending in an audition tape.Kodi Smit-McPhee was originally cast in the role, when filming was originally beginning in December 2007, but he opted out to film The Road.

Liev Schreiber as Victor Creed / Sabretooth: Logan's brother and fellow soldier. Jackman and Hood compared Wolverine and Sabretooth's relationship to the Borg-McEnroe rivalry in the world of tennis: Sabretooth hates him because he loved and needed his brother, inspired by Dog Logan, Wolverine's sibling in Origin, but is too proud to admit he needs him back. Tyler Mane, who played him in X-Men, had hoped to reprise the role.Jackman worked with Schreiber before, and described him as having a competitive streak necessary to portray Sabretooth. They "egged" each other on set to perform more and more stunts. Schreiber put on 40 lb (18 kg) of muscle for the part,and described Sabretooth as the most monstrous role he ever played. As a child, he loved the Wolverine comics because of their unique "urban sensibility". Schreiber had studied to be a fight choreographer and wanted to be a dancer like Jackman, so he enjoyed working out their fight scenes.

Michael-James Olsen as Young Victor Creed: James's half-brother.

Peter O'Brien as John Howlett: Victor's father and James's adoptive father.

Alice Parkinson as Elizabeth Howlett: James's mother.

Aaron Jeffery as Thomas Logan: James's real father.

Danny Huston as William Stryker: Schreiber was originally in negotiations for the part, while Brian Cox, who played the character in X2, wanted to reprise the role. He believed computer-generated imagery, similar to the program applied to Patrick Stewart and Ian McKellen in the opening flashback of X-Men: The Last Stand, would allow him to appear as the younger Stryker. Huston liked the complex Stryker, who "both loves and hates mutants because his son was a mutant and [drove] his wife [to suicide]. So he understands what they're going through, but despises their [destructive] force." He compared the character to a racehorse breeder, who rears his mutant experiments like children but abandons them when something goes wrong.

Lynn Collins as Kayla Silverfox: Wolverine's love interest and later captive of Stryker. Michelle Monaghan turned down the role because of scheduling conflicts, despite her enthusiasm to work with Jackman.

Taylor Kitsch as Remy LeBeau / Gambit: A Cajun thief who has the ability to charge any object he touches with potential energy, forcing it to explode. The size of the object determines the magnitude of the resulting explosion. He is also skilled in the use of a bo staff.

Daniel Henney as David North / Agent Zero: A member of the Weapon X program and an expert tracker with lethal marksman skills.

will.i.am as John Wraith: A teleporting mutant. It is Will.i.am's major film debut. Although he initially did not get on with the casting director, he got the role because he wanted to play a mutant with the same power as Nightcrawler. He enrolled in boot camp to get into shape for the part. When filming a fight, he scarred his knuckles after accidentally punching and breaking the camera.

Ryan Reynolds as Wade Wilson / Deadpool: A wisecracking mercenary who can heal like Wolverine. Reynolds had been interested in playing the character in his own film since 2003. Originally, Reynolds was only going to cameo as Wilson but the role grew after he was cast.

Kevin Durand as Frederick J. Dukes / Blob: A mutant with an indestructible layer of skin. In the film's early sequences, he is skinny, but years later, he has gained an enormous amount of weight.

Dominic Monaghan as Chris Bradley / Bolt: A mutant who can manipulate electricity.
Tahyna Tozzi as Emma Frost: A mutant with the powers of telepathy and turning her skin into diamond.X2 writer Dan Harris said that Sigourney Weaver would have played Emma Frost in X-Men: The Last Stand if Bryan Singer had stayed on to direct.

Scott Adkins as Weapon XI: Weapon XI has powers "pooled" from many other mutants killed or kidnapped in the film, including Wolverine's healing factor, Cyclops' optic blasts, Deadpool's martial arts ability and Wraith's teleportation ability. He also has retractable blades from his arm capable of killing Wolverine. He's the final antagonist of the film, having been genetically altered to be the ultimate mutant killer.