Bradley Cooper, Ed Helms, and Zach Galifianakis at the LA Premiere of The Hangover Part II

The many men of The Hangover Part II gathered at Grauman's Chinese Theatre last night for their big LA premiere. Bradley Cooper was dapper in a Tom Ford suit and flashed a big smile for photographers next to his costars Zach Galifianakis and Ed Helms — they even had Crystal the Monkey there! Ken Jeong was one of the first down the carpet, and he spoke to us about his excitement at reuniting with the guys. He even admitted to being open to expanding his Mr. Chow character in a possible spinoff. Ken, who's actually an MD in real life, said his medical knowledge came in handy when some of his castmates came down with food poising while they filmed in Thailand! Ed Helms was likewise thrilled to get a meatier part in the sequel. His small-screen project, The Office, aired its season finale yesterday, and Ed revealed that he doesn't know what's next, but Steve Carell's rumored replacement, Catherine Tate, is a pro. The screening brought out plenty of famous faces, like cute couple Kristen Bell and Dax Shephard, Mike Tyson, and a super-pregnant Alyssa Milano. Kristen and Crystal shared an especially intimate moment. Stay tuned for more on today's PopSugar Rush!