Revealed! Zac Efron's New Naked Friend

We get the skinny on who the Disney star was playing around with in a sandbox

So who is that frolicking naked in a sandbox with Zac Efron in his just released racy photo shoot for Interview magazine?

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...