Beyonce Knowles handed off her adorable on screen son to costar Idris Elba on the set of Obsessed in LA yesterday. The movie is about an obsessive woman, played by Ali Larter, who tries to get between her boss and his wife, played by Idris and Beyonce. We've seen B's dramatic, musical and even comedic sides, but this will be her first shot testing out her chops in a thriller. After the rave reviews she's already getting from her Cadillac Records costars, I'm looking forward to seeing what she comes out with next. Though, at some point I also wouldn't mind seeing her and Jay-Z fulfill all those rumors and have a little guy (or girl) of their own. Just saying.