Zac Efron and Seth Rogen are busy promoting their upcoming movie "Neighbors", which will be shown in theaters on May 9. They can be seen appearing in all sorts of TV shows and doing promotional clips just to create a buzz for their latest film.

Their latest act shocked the viewers of the TV series "Workaholics" when Zac dropped his pants and flashed his penis! He and his co-star Seth were trying to impress Adam, Anders, and Blake so that they can win them over and become the fourth member in their cubicle.

Zac tried to impress the trio by doing some cool dance moves and showering them with compliments while Seth didn't make much effort. But when the former Disney star said he was Jewish, the "Pineapple Express" couldn't take it anymore. Seth said, "If you are Jewish, you will show me your Jewish dick!"

Adam, Anders, and Blake agreed and chanted, "We got to see that dick" while clapping hands. So Zac dropped off his pants and that surely impressed the trio. Adam exclaimed, "Holy fucking shit!" while his biggest competitor Seth said "It's amazing, it's fucking gorgeous, OMG!"

The battle between Zac Efron and Seth Rogen ended after the Hollywood heartthrob flashed his penis. The 26-year old actor said, "It's fully circumcised, there it is." The 32-year-old comedian gushed over it and said, "Did Leonardo da Vinci circumcise you? It's beautiful!" Seth added, "Your balls got a six-pack." Then he shouted, "Put it away, put it away...it's too nice!"

Adam, Anders, and Blake chanted again while clapping hands saying, "That was a great dick" three times. Seth still tried to convince the three cubicle owners that he is worthy of becoming the fourth member. He even flashed his penis, but that didn't impress the trio.

Adam finally announced who the winner was between Zac Efron and Seth Rogen. He said, "In conclusion, you (Seth) suck while you (Zac) freaking rule!"

Check out the hilarious clip of the "Neighbor's" stars' appearance on Comedy Central's "Workaholics":