It's the age-old question: Can men and women just be friends? In "Sleeping With Other People," the question gets a twist: Can a man and a woman, both addicted to sex, just be friends?

The trailer for the romantic comedy, which debuted at Sundance, shows that the answer is: It's very, very difficult. "Sleeping With Other People" seems to be an updated version of "When Harry Met Sally." As Lainey (Alison Brie) observes of her relationship with Jake (Jason Sudeikis), "We're not a couple, but we act like one."

​Lainey and Jake are old friends who hooked up years ago, and run into each other at a sex addicts meeting. They decide to keep things platonic, even though sparks are flying. Judging by the trailer, the movie looks to be a sweet and funny good time, and Brie and Sudeikis have great chemistry. And the rest of the cast is awesome: Adam Scott, Natasha Lyonne, Amanda Peet, and Adam Brody.

"Sleeping With Other People" opens in theaters September 11.

Want more stuff like this? Like us on Facebook.