Who is Zac Efron's Mystery Woman?

Zac Efron leaves Smashbox Studios with a mystery woman following him after a photo shoot in Los Angeles on Thursday.

The 20-year-old High School Musical sensation gave us a peek of his boxers just yesterday. Pick up your pants Zac. Pick’em up!

The Kenny Ortega-directed HSM3 opens on October 24th. Now less than three months away! Go Wildcats!

10+ pictures of Zac Efron and his mystery woman…