Zac Efron does some pushups between takes on the set of ‘Dirty Grandpa’ on April 27, 2015 in Tybee Island, Georgia. Zac returned to work after spending the weekend in LA with his girlfriend Sami Miro. The couple reportedly enjoyed a night of karaoke at Blind Dragon. Sami bragged about kissing Zac on Instagram. Photos: FameFlynet.