Sharon Stone is celebrating Mother’s Day. She joins Andie MacDowell and her real-life daughter Rainey Qualley, who were announced yesterday, in the indie drama about the relationship between 12 mothers and their daughters. Previously announced cast members include Susan Sarandon and her real-life daughter Evan Amurri Martino as well as Christina Ricci. Mother’s Day will be directed by Paul Duddridge, who also wrote the screenplay. Danielle James is producing. Stone is repped by Paradigm and Binder & Associates.