Count the Comedy Stars in Matt Walsh's Improv Stoner Comedy High Road

Upright Citizens Brigade co-founder Matt Walsh (Outsourced) called on a dozen of his fellow comedians to act in his directorial debut High Road, an improvised film about a weed dealer (James F. Pumphrey) torn between his "career," his musical aspirations, and his pregnant girlfriend (Abby Elliott). Hit the trailer after the jump and see how many of your favorite comedy players, including veterans of The State, Saturday Night Live, and Walsh's short-lived series Players show up in the lo-fi indie comedy. (Well hello, Horatio Sanz!)

Okay, here's a cheat sheet: Lizzy Caplan, Abby Elliott, Rob Riggle, Ed Helms, Joe Lo Truglio, Kyle Gass, Horatio Sanz, Andrew Daly, and more co-star with Pumphrey in the film, which is based loosely on a drug dealer Walsh knew once in Chicago who went on to enjoy a successful career as a writer.

Walsh, who has appeared in every single Todd Phillips movie to date, co-wrote High Road with Josh Weiner and gathered so much footage that he reportedly began editing with an eight-hour cut of the film. The 83-minute final version premieres at the Newport Beach Film Festival on April 29.