PHOTOS: Heather Graham, Hangover Hottie

The always sexy Heather Graham floated down the red carpet in a butterfly embellished little white dress at the Spanish premiere of The Hangover in Barcelona on Tuesday.

Heather was joined by her co-stars Bradley Cooper, Zach Galifinakis and Justin Bartha for the premiere of the movie, which has already broke records in the U.S. as the top grossing R-rated comedy of all time!

SEE ALL 23 PICS OF THE HANGOVER PREMIERE IN THE GALLERY!