The Hangover boys are back in Las Vegas, and from the looks of the debut teaser from Warner Bros., they are up to their old tricks. Yet, there is a unique feel to this first look inside the world of Todd Phillips and his final foray of the "three best friends" in The Hangover Part III.

Fresh off the premiere of The Hangover Part III poster yesterday, the first inkling into the plot has arrived! Looks like Alan's (Zach Galifianakis) father has passed away. And who knew? Alan has the voice of an angel, as we see in the trailer! Phil (Bradley Cooper) and Stu (Ed Helms) have to go with Alan to Las Vegas for some unknown reason (as of yet) and there they meet with some old friends including Heather Graham's Jade and that pesky gangster Mr. Chow (Ken Jeong).

Now, we're looking forward to finding out how and why Mr. Chow has a policeman's badge if he's one of the world's most notorious gangsters. And wasn't he a friend to the guys in Hangover Part II? Why is he so menacing in Part III?

The Hangover Part III Teaser

The Hangover movies have enthralled and entertained millions and it appears that director Phillips has crafted a fine send-off for our favorite guys who can't seem to stay out of trouble. The Hangover Part III lands in theaters Memorial Day weekend.