Efron celebrates 21st with 'Musical' cast

Zac Efron spent his 21st birthday party with family, friends and some of the High School Musical cast.

The actor, who was dressed casually in a T-shirt and jacket, celebrated on Saturday at the Pace restaurant in LA.

According to People, the event was organised by Efron's girlfriend Vanessa Hudgens.

Guests included Monique Coleman, Ashley Tisdale, Aly and AJ Michalka, Brittany Snow and Michelle Trachtenberg.

Efron's presents reportedly included bottles of liquor, which marked him becoming the legal age to drink alcohol.

He left the Italian eatery before midnight, but apparently continued partying at a nearby hotel with a selection of close friends.