Jennifer Lawrence, star of Winter's Bone, has signed on to play Mystique in X-Men: First Class. Lawrence has been showered in critical praise for her turn in Winter's Bone, and she's already being pegged as a serious contender for the Best Actress Oscar. Rebecca Romijn played Mystique in the original X-Men trilogy.
Director Matthew Vaughn has built an impressive young cast for the film, with James McAvoy and Matthew Fassbender leading the way as Professor X and Magneto, respectively.
X-Men: First Class will hit theaters on June 3, 2011.