Just days before its premiere at the Cannes Film Festival, a clip for Polisse has been released, offering a sneak peak at Maïwenn's first official entry at the fest. The actress, screenwriter and director, who was once married to Luc Besson, is one of the many female filmmakers selected for the official competition this year. She also has a supporting role in the film.Read the synopsis and check out the images after the jump. The 2011 Cannes Film Festival starts tomorrow and runs through May 22nd.Starring Karin Viard, Marina Foïs, French rap star Joey Starr, Lou Doillon, Sandrine Kiberlain and Anthony Delon (Alain's son), Polisse is slated for release in France on October 19.Read the synopsis before checking out the French video on Allociné:

The daily grind for the cops of the Police Department's Juvenile Protection Unit - taking in child molesters, busting underage pickpockets and chewing over relationship issues at lunch; interrogating abusive parents, taking statements from children, confronting the excesses of teen sexuality, enjoying solidarity with colleagues and laughing uncontrollably at the most unthinkable moments. Knowing the worst exists and living with it.

How do these cops balance their private lives and the reality they confront every working day?

Fred, the group's hypersensitive wild card, is going to have a hard time facing the scrutiny of Melissa, a photographer on a Ministry of the Interior assignment to document the unit.

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Joey Starr, Lou Doillon, Sandrine Kiberlain and Anthony Delon