January Jones is baring her body once again this week -- following up her revealing Golden Globes dress with a skimpy "X-Men" costume!

The first photo from the upcoming X-Men prequel, "X-Men: First Class" popped online today over at The Hollywood Reporter, showing January dressed (sorta!) as the sexy Emma Frost in lingerie and a white cape.

Also in the cast (from left to right) are Michael Fassbender as Magneto, Rose Byrne as Moira MacTaggert, Jones, Jason Flemyng as Azazel, Nicholas Hoult as Beast, Lucas Till as Havoc, Zoe Kravitz as Angel Salvadore, Jennifer Lawrence as Mystique and James McAvoy as Charles Xavier.

The movie opens January 3.

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