It looks like Dave Franco was a little uncomfortable when he filmed his sex scene in his latest movie "Neighbors." In the film the actor sleeps with Zac Efron's onscreen and off screen girlfriend Halston Sage.

According to E! News, James Franco's little brother stopped by "Chelsea Lately" on Thursday to chat about his new film.

He told the host, "It was my first real sex scene where I show my butt," adding, "You're not going to have that reaction when you see it on the big screen, trust me,"

The actor who is dating Alison Brie explained, "It was nerve-wracking."

Describing the scene in which he has sex with Zac Efron's girlfriend Halston Sage the actor said, "I was pretty nervous for the scene," adding, "I met the girl the day before and she was beautiful and very sweet, but it's awkward. You meet each other and then you're grinding-you don't even know her name, barely.

"You have 20 crewmembers who are also watching you do it. And then, of course, for me, I woke up that morning and I had a giant pimple on my ass...It sucks, right?

"I had to go to the makeup artist who I had also met that week and be like, 'Can we go in the other room and you'll put makeup literally on my ass?' So that was that."

In the scene, Franco's character is walked in on by actor Jerrod Carmichael. The actor revealed, "He has this view of me that no one should have. He essentially had a staring contest with my brown eye and lost."

Following the sex scene is a fight scene in which Dave Franco's "Neighbors" costar Zac Efron spoke about during an appearance on Jimmy Fallon's show.

The "That Awkward Moment" star explained, "We did all our own stunts...it was a standoff between, basically he sleeps with my girlfriend."

Fallon interrupted Efron and said, "I know, I saw the movie, but you don't punch his face."

To which the actor replied, "No I grab his balls really hard," adding, "And he grabs mine...those Franco brothers just have balls of steel. But I did legitimately break my hand."

Will you be going to check out "Neighbors" in a theater near you? Let us know in the comment section below.