The First Lady better watch out ... she has some fierce competition. Stunning actress Malin Akerman is out to "mess up" Barack Obama's marriage (and her own) with a White House fling. Of course she's joking, but the Swedish-Canadian 'Watchmen' star sure likes her some Beltway beefcake.

"I get sweaty palms when I think about him," she tells Esquire magazine. "He's so supremely intelligent, and he's a man. I just want to go in there and become a home wrecker. No, I really don't."