Actor Oliver Platt has signed on for a mysterious role in Matthew Vaughn's upcoming film X-Men: First Class, according to Deadline New York.

Platt will play the non-mutant role of The Man in Black in the film, although more details on the character weren't given. Platt joins a cast that already includes James McAvoy, Michael Fassbender, Kevin Bacon, Jennifer Lawrence, Nicholas Hoult, Caleb Landry Jones, Edi Gathegi and Jason Flemyng.

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Matthew Vaughn is directing from a script by Jane Goldman and Zack Stentz.

In related news, Comic Book Movie is reporting that Jane Goldman indicated that X-Men: First Class will start shooting in three weeks. Here's an excerpt from the site's piece:

"I think it's in my contract that I actually get killed if I say much. It's going really well and I am very excited. I watched a bunch of pre-viz yesterday and went home feeling so excited. We start shooting in about three weeks. We have an incredible cast and we're all very excited. When I came to visit this set the other day, they're across Pinewood, and there were X-Men people walking around in bathrobes."

We'll be sure to keep you posted with any further updates on X-Men: First Class as soon as we have more information.