On the scene with Gwyneth Paltrow, Pink, Josh Gad, more at the 'Thanks for Sharing' premiere

“Oh I’m not an actress,” said Alecia Moore (aka Pink) at the Los Angeles premiere of Thanks for Sharing. “I was like, ‘ok, why me?'” she laughed. “You want me to do the soundtrack?”

Modesty seemed to be the theme at the ArcLight Hollywood Monday night, which stars Gwyneth Paltrow, Tim Robbins, Patrick Fugit, Josh Gad, Moore, and director Stuart Blumberg turned out to celebrate their film that opens in limited release on Sept. 20. Despite the rom-com marketing Thanks for Sharing is actually a somewhat dark multi-story look at the world of sex addiction. Blumberg, who co-wrote The Kids Are All Right, said, “I wanted to explore not just when people go down the rabbit hole, but when they try to come up.”

Moore plays the part of Dede, the single female member of the sex addict support group where she encounters Robbins, Gad, and Mark Ruffalo’s characters. “I read some books on sex addiction and showed up,” Moore said on how she prepped for the role. “I know a lot about addiction. I’ve lost a lot of people in my life and had some interesting experiences myself. I believe that all addiction comes from the same monster, it just wears different masks.” She added: “I am a firm believer that a spoonful of sugar makes the medicine go down, and this is that movie.”

Fugit plays the drug-addicted son of Robbins’ character. He said of their scenes together: “Tim comes from the 70s and early 80s school of film acting. He’s kind of an old hard ass. He’s a salty old dog. He really smacked me. It was raw, rough, and really fun.” Robbins added: “It’s always upsetting. No one got hurt. We apologized at the end and hugged each other.”

The set was not as tense as the sobering subject matter. Blumberg said when filming Paltrow’s strip tease (featured in the trailer), in which she sports a lacy bra and thigh highs and gives Ruffalo a lap dance, they got an unexpected visitor. “Her husband [Coldplay frontman Chris Martin] walked in in the middle of it,” said Blumberg. “It was hysterical. He just said, ‘carry on. She looks great.'”

“I hope the outtakes come out on the DVD. The last scene, the bonfire scene with Josh Gad is ridiculous. That guy is stupid funny. Pee came out, I laughed so hard,” said Moore.

“I’m surprised she told you,” said Gad with a laugh. “I would not call it a little, I would call it a stream. And I would say it was very embarrassing.”