Zac Efron
Actor Zac Efron arrives at the 2014 MTV Movie Awards in Los Angeles, California April 13, 2014.REUTERS

Zac Efron is going all out to promote his upcoming flick "Neighbors". In his wake to create buzz, the 26-year-old actor recently dropped his pants on Comedy Central's show "Workaholics" and showed off his private parts to the cast members.

 The actor was accompanied by "Neighbors" co-star Seth Rogan and the two really did some extremely funny things with Adam, Anders and Blake in their office cubicle. The video of Rogan and Efron promoting their film on "Workaholics" has now gone viral. 

"Neighbors" will hit screens on May 9 and after all the promotional gimmicks, the fans can't wait to watch the film

Meanwhile, Efron recently created buzz for going shirtless on March 7 at the MTV Movie Awards. It was Rita Ora who ripped his shirt open and the actor was generous enough to accept the awards with his upper body showing. Regarding his shirtless appearance he tweeted,

"If I beat Thor- I'm accepting the award shirtless on stage. #movieawards."

It was nice to see Efron all happy and pumped up on the Comedy Central show and at the awards function, especially after reports of his rehab visits have been making headlines. And it seems there is one more thing, which is making Efron happy - his "Neighbors" co-star Halston Sage. Buzz is that the two are dating.

They are definitely an item," a source told E! News, adding: "They were seeing each other a bit during filming of their movie together and ever since he went to rehab they got a lot closer. Her friends love him and say he is so sweet. He's really good to her."

The alleged couple was also seen at Staples Center on April 4, watching the Los Angeles Lakers and Dallas Mavericks match. They were seen smiling and getting cozy with each other, thus sparking dating rumors.