Zac Efron the star of High School Musical 3: Senior Year celebrated his 21st birthday Saturday with an intimate two-hour dinner party at L.A.’s Pace restaurant with a group of friends and family that included his parents and brother, girlfriend Vanessa Hudgens, HSM3 costars Monique Coleman and Ashley Tisdale, her boyfriend Jared Murillo and pals Michelle Trachtenberg, Amanda Bynes, Brittany Snow and singing sisters Aly and AJ Michalka.
Zac Efron kept dressed casually in a T-shirt and jacket while Vanessa, who reportedly "helped plan the party," wore a colorful mini-dress. Now that Zac is of legal age he was able to drink and some of the guests brought alcohol as presents.
The couple left the Italian eatery hand-in-hand just before midnight and disappeared into a waiting car. But the celebration continued at a nearby hotel, where Zac hosted an after party with some of his dinner guests. Source