PARIS– French star Vincent Cassel (“Black Swan”) has boarded “Rien ne sert de courir,” Maiwenn’s follow-up to “Polisse.”

Cassel will star opposite Emmanuelle Bercot, who co-wrote and starred in “Polisse.” Project reunites Maiwenn with “Polisse” producer Alain Attal at Les Productions du Tresor, the shingle behind Guillaume Canet’s “Blood Ties” and Romain Duris starrer “Populaire.”

The plot of “Courir” is being kept under wrap. Its title is inspired by a famous Jean de la Fontaine fable.

Etienne Comar, who collaborated with Xavier Beauvois on the script of Cannes’ grand prize winner “Of Gods and Men,” co-wrote “Courir” with Maiwenn.

Lensing is skedded for March 3.

Since making her directorial debut with “Pardonnez-moi” (“Forgive Me”), Maiwenn has established herself as one of Gaul’s   leading femme helmers.

“Polisse,” a gritty drama set at a Paris’ child protection unit, competed at Cannes, where it won a Jury award and earned warm reviews. Sold by Wild Bunch, the pic was acquired by IFC for U.S. distribution. Pic had a solid run in France and grossed over $20.3 million worldwide.

Leading a career in France and in the U.S., Cassel – who’s repped by CAA and Adequat — stars in very few Gallic movies. He will next be seen in Christophe Gans’ “The Beauty And The Beast” with Lea Seydoux.