One day, while hanging out on the Charleston, S.C. set of the 2010 Nicholas Sparks weepie Dear John, star Channing Tatum got to talking with costar Scott Porter (Friday Night Lights) and the film’s screenwriter, Jamie Linden (We Are Marshall). Porter and Linden were old high school buddies, and they’d just come back from their 10 year reunion. “Channing didn’t go to his,” Linden tells EW, “so he had a bunch of questions.” Soon, producers Reid Carolin, Marty Bowen, and Wyck Godfrey joined in.

Sometimes, filmmaking is just that simple: Stars + writer + producers + personal experience = The indie ensemble comedy 10 Years, written and directed by Linden, and starring Tatum, Porter, and a who’s who cavalcade of young Hollywood. EW has an exclusive first look at the poster for the film, which opens Sept. 14 — check it out below:

As the poster implies, Tatum and Rosario Dawson play ex-high school sweethearts who haven’t seen each other for years. That particular shot of them together as teenagers was Photoshopped, but Linden says his cast shares a surprising amount of personal history. “There are pictures of Chris Pratt and Rosario from 10 years ago,” he says. “Kate [Mara] and [Anthony] Mackie have known each other for a long time. And Mackie and Oscar [Issac] went to Juilliard together with Lynn [Collins]. There’s all sorts of one degrees of separation with all the cast.” He chuckles. “‘Young Hollywood,’ for lack of a better term — that feels like something out of a Bret Easton Ellis novel — is kind of a small group. Everyone knows each other.”

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This post has been updated to reflect the new release date for the film, and that it is a comedy, not a drama.