Zac Efron finally showed off his goods on "Dirty Grandpa" trailer. His bod attracted more attention than anything else on "Dirty Grandpa" trailer, which means that his girlfriend Sami Miro did a good job helping him keep to his training schedule. His relationship with Sami is definitley paying off!

According to Just Jared, "Zac Efron walks along the beach in his birthday suit with just his hand covering himself in this racy moment from the new Dirty Grandpa international trailer. At the end of the trailer, the 28-year-old actor is seen with just a stuffed animal tied around his waist to keep himself modest. A child then rushes at him and grabs the doll, leaving him fully unclothed in public."

Looks like Zac Efron is turning out to be the next Channing Tatum!

The secret to Zac Efron and his girlfriend Sam Miro sustaining their relationship for this long may be in their workout routine. Zac Efron and Sami Miro were caught again breaking a sweat together. Couples that workout together stay together!

According to Just Jared, "Zac Efron pushes his hair back with a bandana while getting ready for a jog on Saturday afternoon (December 12) in Los Angeles. The 28-year-old Dirty Grandpa star was joined by his girlfriend Sami Miro. The cute couple held hands and stretched out together before running side-by-side along the path."

But now Zac Efron is concentrating on new movies, which means that he may not have enough time for his girlfriend as much. Seeing how Zac and Sami just got back from their romantic getaway in Japan, they must be thinking about the next steps in their relationship as "Neighbors" star focuses on movies.

Most recently, Zac Efron was rumored to be on the list of actors contending for the role a legendary football player Jamie Vardy in a new movie. According to Goal.com, "And now, following the Leicester man's charge up the footballing pyramid, the story could be turned into a Hollywood hit if latest rumours are to be believed, with High School Musical star Efron a possibility and the likes of Andrew Garfield and Robert Pattinson also linked to the role."

Let's see if Zac Efron can pull through in one of the biggest roles of his life - portraying legendary player Jamie Vardy on screen! That means that he may have to change his workout routine.

With all the rumors surrounding Zac Efron and Sami Miro, plus the fact that the actor loves to post about his girlfriend, the wedding bells may be ringing very soon!