Christopher Walken among cast of Todd Solondz drama

Mia Farrow and Selma Blair also join indie "Dark Horse."

Christopher Walken, Mia Farrow and Selma Blair are joining Jordan Gelber in "Dark Horse," the latest indie drama from Todd Solondz.

Ted Hope is producing via his newly launched, New York-based shingle Double Hope Films.

The film centers on a thirtysomething man (Gelber) in arrested development who lives with his parents (Walken and Farrow), reluctantly works for his father and avidly collects toys. He seeks out a thirtysomething woman (Blair) in arrested development in an attempt to shed the "dark horse" status in his family and finally accomplish something.

Aasif Mandvi, a correspondent for "The Daily Show With Jon Stewart" who appeared in "The Last Airbender," also is in the movie, playing Blair's "not quite" ex-boyfriend.

Already cast are Justin Bartha ("The Hangover") as Gelber's more successful brother, Zachary Booth ("Nick and Nora's Infinite Playlist") as Gelber's easygoing cousin and Donna Murphy ("Spider-Man 2") as Walken's secretary.

Principal photography began this week, with shooting in New York's Westchester County and Long Island.

Derrick Tseng, who collaborated with Solondz on "Life During Wartime" and "Palindromes," is co-producing. Goldcrest Films is handling international sales.

Walken has been working solidly in the indie world, racking up credits including "The Irishman," "Life's a Beach" and "The Maiden Heist." The ICM-repped actor received a Tony nomination this year for his lead role in the dark comedy "A Behanding in Spokane."

"Horse" will mark Farrow's first screen appearance since 2008's "Be Kind Rewind." She is repped by the Hofflund Co.

Blair, repped by Gersh and Global Creative, recently wrapped the ensemble indie "The Family Tree" and the thriller "Columbus Circle."