I know that this one is a bit long but I really think that this movie and the actors deserve a mention.

In X-Men: The Last Stand, a "cure" for mutancy threatens to alter the course of history. For the first time, mutants have a choice: retain their uniqueness, though it isolates and alienates them, or give up their powers and become human. The opposing viewpoints of mutant leaders Professor Charles Xavier, who preaches tolerance, and Magneto, who believes in the survival of the fittest, are put to the ultimate test -- triggering the war to end all wars.
The cast of the first two movies have returned for this third installment along with some new faces.

Hugh Jackman as Logan/Wolverine

Halle Berry as Orora Munroe/Storm

James Marsden as Scott Summers/Cyclops

Famke Janssen as Dr. Jean Grey/Pheonix

Patrick Stewart as Professor Charles Xavier

Shawn Ashmore as Bobby Drake/Iceman

Anna Paquin as Marie/Rogue

Aaron Stanford as John Allerdyce/Pyro

Sir Ian McKellan as Eric Lensherr/Magneto

Rebecca Romijn as Raven Darkholme/Mystique
And then there are a couple that appeared in the other movies.

Kea Wong as Jubilation Lee/Jubilee

Daniel Cudmore as Peter Rasputin/Colossus
And then there are the newest faces

Kelsey Grammer as Dr. Hank McCoy/Beast

Vinnie Jones as Cain Marko/Juggernaut

Ben Foster as Warren Worthington III/Angel

Dania Ramirez as Callisto