The X-Men franchise returns this summer with a prequel, starring an all new cast, and we've got a sneak peek at their on-screen transformations.
Leading the male cast are Atonement's James McAvoy and Inglorious Basterds actor Michael Fassbender, who play a young Professor X and Magneto as they discover their super powers for the first time. A Single Man actor Nicholas Hoult also makes an appearance as fellow mutant-hero, Beast.
The film isn't without a suitably hot cast of ladies either, as Mad Men star January Jones takes on her biggest film role to date. And while she may be best known for her part as troubled 60s housewife Betty Draper, in X Men: First Class she's completely transformed as leather-clad bombshell, Emma Frost.
Keep an eye out for the award winning, up-and-coming actress Jennifer Lawrence - who's Oscar-tipped for her role in Winter's Bone, and Damages star Rose Byrne, too.
By Hayley Spencer