The funny men are back in their highly-anticipated action-comedy, "This Is the End."
In the film -- which stars Seth Rogen, James Franco, Jonah Hill, Jay Baruchel, Craig Robinson, Danny McBride and more -- humans are faced with the harsh reality that the world is actually ending. While holed up in Franco's house, six friends attempt to survive the apocalypse that's occuring outside ... and hijinks ensue.
Some of the film's actors -- who portray themselves in the comedy flick -- recently talked to Cari Skillman of KABC Television, OTRC.com's parent company, about their adventures while filming and the art of improv comedy.
(View PHOTOS from the film's star-studded premiere, featuring Emma Watson and Carmen Electra.)
Check out the five highlights from our interview with Rogen, Baruchel and Robinson below.
1. The idea of an "apocalyptic stoner comedy" actually requires A LOT of preparation.
"We wrote a whole script -- this isn't one of those ideas you can just pitch as an 'idea,'" Rogen explained to OTRC.com. "You need to give a pretty good indicator of exactly how you're going to execute it. So, we just wrote it ourselves, and then we gave them the script -- we had like a whole presentation, we did a lot of pre-visual of some of like, the bigger action sequences to give them a sense of how it would look."
"The goal is to leave very little to the imagination of the studio when you're pitching something like this -- so that's what we tried to do," Rogen said.
The film marks the "Pineapple Express" actor's directorial debut. He directed the film alongside Evan Goldberg of "Knocked Up" and "Superbad."
2. Before pitching to studios, however, Rogen pitched the idea to ... his friends.
"Before we even sat down to write the movie, we go to all the guys and say, 'Do you want to be in this movie we're writing?'" Rogen said. "We shouldn't have started writing a movie that's starring Jay and Craig if Jay and Craig have no interest in being in the movie. So, before we wrote it, we went to them and said, 'We're thinking of writing this movie, would you guys hypothetically be interested in it?'"
3. Despite the film's catastrophic nature, the star's tried to stay away from being "too blue."
When asked if they could have gone "too far" in the apocalyptic film, Baruchel quickly explained that it actually happened a lot, commenting: "Constantly. I think we could have gone too dramatic as well, too horror heavy, too religious, too blasphemous."
"And we do, we do all of those things as we're filming it, and then you kind of scale it all back in the editing and find the right balance," Rogen added.
4. Since the actors play themselves in the movie, there was "a ton of improv" involved.
"I think every scene, there was a ton of improv," Robinson explained to OTRC.com. "You've got Seth and Jonah going at it, and you have to jump in where you fit in. And I don't even think the cameos -- a bunch of cameos -- were even written, they just went for it."
"We would write ideas for people -- you never just like talk, you know?" Rogen added. "You say like, 'Okay, in this scene, you're arguing with him about this, so maybe you can say some stuff like this and talk like this."
"Yeah, you never just show up and say like, 'Hey, do you like chicken nuggets? I do,'" Baruchel joked.
The film features cameo appearances by a number of high-profile celebrities including Rihanna, Emma Watson, Channing Tatum, Paul Rudd, Mindy Kaling, Michael Cera, Christopher Mintz-Plasse and Martin Starr.
5. The biggest uncredited character in the film? The city of Los Angeles.
"There is some sense, we always felt, that if the world does end it'll start in Los Angeles probably," Rogen said. "In most movies, that's where it starts."
"Los Angeles is a huge character in the movie," Baruchel explained.
Click HERE to watch the red band trailer for "This Is the End." (Warning: The film is rated for Mature audiences and the trailer contains 14 expletives and drug references and images)
Reporting by Cari Skillman of KABC Television, which produces the entertainment show "On The Red Carpet" (check for local TV listings).