Here she is! The lucky gal is 20-year-old Lithuanian model Edita Vilkeviciute.
And would you believe she didn't know who Zac was until the day of the shoot?
Read on for the dirty details...
Just before they started to get dirty, Vilkeviciute admitted to the High School Musical golden boy she didn't know who he was. "Since I've never watched American television, I didn't understand until everyone started asking me to get his autograph," she tells writer Leila Brillson.
But then Mr. Efron had something to share, too. "Zac finally admitted to me that this was his first real fashion shoot," Vilkeviciute says. "So we both got to relax."
So Zac's first time was with Edita? We're sure he relaxed just fine.