Countdown to Memorial Day!

The Hangover: Part II trailer has just been released, and while it doesn't give too much away, we can only imagine what crazy trouble our fave wolf-pack is going to fall into in Bangkok!

Thankfully the old crew including Zach Galifianakis, Bradley Cooper, Justin Bartha, Ed Helms, Ken Jeong, and Mike Tyson are all returning for the sequel, but there are also some surprising new additions to the cast.

Liam Neeson, who took over the role of "Tattoo Man" from Mel Gibson, Juliette Lewis, Jamie Chung, and even former President Bill Clinton will all make appearances in the next installment. What a cast! But where is Heather Graham? We're bummed she didn't make the cut, we loved her with Ed Helms!

The Hangover II officially hits theaters May 26. Check out a pic from the set, after the jump ...