'The Hangover Part II' trailer: Three men and a monkey

A man with a shaved head, a man with a face tattoo, a clothed monkey, and Bradley Cooper walk down the streets of Bangkok. What's the punchline? We don't know yet! (Twist!) The first teaser for Todd Phillips' follow-up to his 2009 hit, The Hangover, has hit the Web — and it looks like the director is still attempting to keep the film's plot under wraps. (Even when baited by EW, Phillips remained mum on details.) I will say, though: If we can't have Carlos in The Hangover Part II (out Memorial Day), I will settle for the monkey. But where's Justin Bartha's Doug? Dude's gotta start wearing a bell. See the trailer after the jump!

Read more:

Liam Neeson in talks for 'The Hangover 2'

Did Zach Galifianakis kill Mel Gibson's cameo in The Hangover 2?

Mel Gibson's 'Hangover 2′ cameo axed

Mel Gibson to cameo in 'Hangover 2′

Jodie Foster on The Beaver and Mel Gibson

Gibson's domestic violence case goes to prosecutors

'Hangover 2′ to get Bangkok dangerous

'Hangover Part II': 6 Exclusive EW Portraits

'Hangover 2′ without Heather Graham… Yeah, we're okay with that