Margot Robbie, John Cena and more premiere The Suicide Squad

Margot Robbie, John Cena, Sylvester Stallone and others attended premiere of their upcoming film The Suicide Squad in Los Angeles on Monday. While Cena is debuting Peacemaker, co-star Robbie is playing Harley Quinn again, only this time her character is single. Before this movie, every time Robbie has played Quinn, Quinn has been in a relationship.

New York:Actors Margot Robbie, John Cena, Sylvester Stallone and their Suicide Squad castmates premiered the antihero/superhero film in Los Angeles on Monday and said that fans should "buckle up." Cena, wearing his character Peacemaker's costume, said "the movie moves like an SOB the first 10 minutes and it doesn't stop." He talked about how a lot of the characters in the film don't make it until the end, let alone the second act. "Like, you figure they're going to give you a chance to catch your breath but you don't. And I think James is really good about crafting that," Cena said.

"We have 25 identifiable superheroes. That's why I'm here in costume. I'm just trying to get everybody familiar with me. But that's what makes it wonderful. James makes you care about every single one. So if someone doesn't make it, you feel an emotional connection."

While Cena is debuting Peacemaker, co-star Robbie is playing Harley Quinn again, only this time her character is single. Before this movie, every time Robbie has played Quinn, Quinn has been in a relationship. "Harley not under the grips of Mr. J is a very different Harley indeed. She's weirdly a bit more settled and focused in this movie than I think we've seen her. But she's also, she's looking for love," she said. "She's just kind of hilarious when she's trying to date."

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She said making this year's film compared to the 2016 one was "totally different."

"Every movie I do with a different director is a completely different experience and you're at a different time in your life and you're shooting in a different city and you with a different group of people so everything is different," she said. "Both were incredible. Both I made lifelong friends and some of which got to carry over into this movie, which was really nice and some of which I'd never met before this movie, and now I will know for the rest of my life."

As for the future of Harley Quinn, Robbie says she'd like to play the character alongside Poison Ivy. "I keep pushing for that," she said. "But honestly, anytime we see her in a new environment with a new group of people, there's always something more to find out about her. So in any iteration, I'm excited."

The Suicide Squad hits theaters and HBO Max on Friday.