Rachel McAdams & Michael Sheen Dating?

In addition to her impressive film resume, Rachel McAdams is also no slouch in the dating department. Among her exes: Josh Lucas and Ryan Gosling.

Now the Canadian actress, 33 -- who has starred in Mean Girls, The Wedding Crashers, The Notebook and more -- is again raising eyebrows for a possible romance. She was recently seen at a Toronto Film Festival afterparty with her Midnight in Paris costar Michael Sheen, 41, who last season memorably played Tina Fey's wannabe boyfriend on 30 Rock.

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