Former Saturday Night Live star Chris Kattan (Mango!) has joined the cast of Adam & Steve, a big-screen romantic comedy about two New York couples — one straight and one gay. And get this: Kattan will play one half of the straight couple! (Yes, you read that correctly.) Parker Posey has signed on to play his wife in the indie flick, which starts shooting later this year. The gay duo will be played by Craig Chester (the pic's writer-director) and Malcolm Gets (Caroline in the City.)