Actress Sienna Miller recently sat down with E! News anchor Maria Menounos to discuss her experience filming the upcoming movie Live By Night.

Miller stars alongside Ben Affleck, who wrote, directed, and stars in the film as gangster Joe Coughlin. Miller plays the character of Irish vixen, Emma Gould.

During the interview, Miller revealed that the script for Live By Night included multiple s-x scenes between her and Affleck’s characters, and that filming them was a comical experience.

“It’s hysterical,” Miller said.

“Ben and I are like brother and sister, thank God, so there was no awkwardness. There was just a lot of stupid giggling.”

“He’s very professional – I am not, but he is. In that environment, it was a cool scene.”

Miller went on to describe the day of filming the s-x scenes, saying “there was a montage in the script saying we did it everywhere: in the car, in the bar…I was like, ‘That’s an entire day of just love scenes! OK. How do we do this?'”

She continued, “Obviously, by the time nine hours of it has gone past, I was shaking with tears running down my face.”

“I mean, I can’t tell you – but you have to laugh. Ben is just professional. It is what it is.”

Despite the comical nature of the experience, Miller also revealed that filming the s-x scenes was difficult, saying “there will be some outtakes from that [scene] where I have to walk out of the room, because I just have tears running down my face.”

Affleck also weighed in on Miller’s comments, saying “Sienna thought that I was trying to make myself out to be some kind of world champion, where it just never ended.”

“I just keep going, going, and going again and again.

“She started laughing and I was like, ‘Laughing isn’t really the response that I’m looking for with this.’

“She was like, ‘How long can you go? You’re Superman!'”