The stars of The Hangover Part II atteneded their Hollywood premiere at The Grauman’s Chinese Theatre in Hollywood, Calif. yesterday and were joined by their favorite furry friend – Crystal the monkey.

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Bradley Cooper, Ed Helms, Zach Galifanakis, Justin Bartha, Ken Jeong and Mike Tyson were all spiffed up while Crystal the monkey was all dolled up in a little pink dress.

Also at the premiere were engaged couple Dax Shepard and Kristen Bell and recently voted off Dancing With The Stars contestant, Romeo Miller. A very pregnant Alyssa Milano walked the red carpet as she proudly showed off her baby bump.

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The Hangover Part II hits theaters May 26. Check out the hilarious trailer below!

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