President William Jefferson Clinton is making a cameo appearance in Hangover 2. Clinton will play himself in the comedy, People is reporting. He filmed his scene in Bangkok, Thailand Saturday. The President was in the capital city to deliver a speech on clean energy. Clinton joins the cast of stars who include Bradley Cooper, Ed Helms, Zach Galifianakis and Liam Neeson, who took over a role originally offered to Mel Gibson.(RadarOnline)