The film, which is based on the play by Colette Freedman, follows four estranged sisters who reunite after their mother's alleged suicide. Garcia will play Sarah, the lesbian girlfriend of one of the sisters, named Austin (Jess Wexler). Weaver stars as the mother.
Sean Hanish is directing and producing for Cannonball Productions. Paul Jaconi-Biery and Eleonore Dailly are producing, while Molina and CBS executive Kelly Kahl serve as EPs.
The film is currently in production in California, and is set for a 2016 release.
In addition to her work on CBS' "Rush Hour," Garcia has appeared in "Dexter," "Vegas" and the 2014 big-screen reboot of "RoboCop." She is repped by Dave Fleming at Atlas, Paradigm and attorney Lev Ginsburg.