By Nicole Sperling
July 15, 2010 at 07:01 PM EDT

Image Credit: Chris Hatcher/PR PhotosYes, it’s true. Sources confirm that Kevin Bacon has joined Matthew Vaughn’s X-Men: First Class cast. Details of his role are being kept under wraps, but sources tell us he will play a villain, sparring against protagonists Charles Xavier, played by James McAvoy, and Magneto, Michael Fassbender’s role. It’s not clear who Bacon’s character is specifically, or how he’ll figure into the X-Men universe, but it will be fun to watch. Deadline Hollywood first reported this last week.

Also joining the team is up-and-comer Jennifer Lawrence who received raves earlier this year for her leading role in the Sundance smash Winter’s Bone. The 19-year old actress will play Mystique, the role originated by Rebecca Romijn in the X-Men trilogy. The Hollywood Reporter first reported this news today.

Twentieth Century Fox declined to comment on either casting addition. Filming is set to begin this summer in London.