Watch <i>The Hangover Part II</i> Trailer

Apple has premiered the first full-length trailer to The Hangover Part II, the sequel to Todd Phillips’ hit 2009 comedy about four friends — Bradley Cooper, Ed Helms, Zach Galifianakis and Justin Bartha — who travel to Las Vegas for a bachelor party, only to wake up the next morning unable to remember a thing or locate the groom.

This time around, the action, and the wolfpack, moves to Thailand for Stu's wedding, and -- well, I'll let you read the official synopsis:

"The Hangover Part II" is director Todd Phillips' follow-up to 2009's smash hit "The Hangover," which became the highest-grossing R-rated comedy of all-time and also won the Golden Globe for Best Film - Comedy or Musical. Reprising their roles from "The Hangover," Bradley Cooper, Ed Helms, Zach Galifianakis, and Justin Bartha star in the film. Jeffrey Tambor, Ken Jeong and Mike Tyson also rejoin the cast. In "The Hangover Part II," Phil (Bradley Cooper), Stu (Ed Helms), Alan (Zach Galifianakis) and Doug (Justin Bartha) travel to exotic Thailand for Stu's wedding. After the unforgettable bachelor party in Las Vegas, Stu is taking no chances and has opted for a safe, subdued pre-wedding brunch. However, things don't always go as planned. What happens in Vegas may stay in Vegas, but what happens in Bangkok can't even be imagined.

The Legendary Pictures/Warner Bros. film opens on May 26. Check out the trailer below, or visit Apple's site to watch it in HD.

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