Watch Greta Gerwig in new trailer

There's a trailer for Fox Searchlight Pictures' upcoming comedy drama 'Mistress America.'

Starring Greta Gerwig and Lola Kirke, 'American Mistresses' is directed by Noah Baumbach.

Plot.

A lonely college freshman's life is turned upside down by her impetuous, adventurous soon-to-be stepsister.

Produced by Baumbach, Gerwig, Scott Rudin, Lila Yacoub and Rodrigo Teixeira,'Mistress America' is set to hit select theaters August 14.