Zac Efron Does David Letterman

Zac Efron keeps his head down as he leads the way for dad David and younger brother Dylan out of Brooks Atkinson Theatre in NYC on Monday night (April 13).

The trio took in a late night showing of new Broadway show, “Rock of Ages,” while Zac’s girlfriend, Vanessa Hudgens landed at LAX.

Zac, 21, appeared on The Late Night with David Letterman yesterday night and shared with the host about getting a little bit tired of hearing the HSM songs. He shared, “Just the other day a mom came up to me and said, ‘You must’ve got sick of the songs,’ and I was like, ‘Yeah, we sing them for two months straight.’ She grabbed my by the shirt collar and pulled me in really close. She was like, ‘Two months? I’ve had this in my car for two years!’ And I realized that it’s gotten completely out of hand.”