Directed by Dito Montiel, the film also features Kathy Baker, Roberto Aguire, Giles Matthey, Eléonore Hendricks and Bob Odenkirk.
Williams, according to Entertainment Weekly, portrays a "married but closeted bank manager whose life changes when he picks up a young male hustler" played by Roberto Aguire.
Here is the trailer:
Starz Digital is handling the North American rights for the new film.
Williams, who died Aug. 11, 2014, starred in a number of theatrical productions, including Mike Nichols’ 1988 Off-Broadway version of Waiting for Godot, co-starring with Steve Martin; and his own one-man show, Robin Williams: Live on Broadway. In 2011 he made his acting debut on Broadway in the title role of Rajiv Joseph’s drama Bengal Tiger at the Baghdad Zoo.