The "High School Musical" alum hit the town in Los Angeles on Wednesday with his girlfriend Sami Miro and one adorable puppy.
Efron put his big biceps on display in a gray fitted T-shirt and finished his edgy look with aviators, dark jeans and a new '70s mustache.
We're not sure if this is for an upcoming movie, or if the 27-year-old's just trying to change up his look -- either way, we're digging it!
The "Neighbors" star was joined by his new girlfriend who matched her beau in an edgy head-to-toe black ensemble. Miro looked stylish in her black beret, black leather jacket, black T-shirt, black skinny jeans and white sneakers for their casual outing.
Also, check out that adorable dog -- it looks like the sexy star has himself a tiny, new companion!
What do you think about Efron's 'stache? Tell toofab in the comment section below and click "Launch Gallery" above to see more "High School Musical" stars then and now!