Keanu Reeves, Maggie Gyllenhaal, Alan Arkin and Monica Bellucci have joined the all-star cast of "
The Private Lives of Pippa Lee," from writer-director Rebecca Miller.
Adapted by Miller -- the daughter of playwright Arthur Miller and wife of Daniel Day-Lewis -- from her forthcoming novel, the dramedy "centers on a dutiful 50-year-old wife whose husband falls for a younger woman, freeing her to explore her buried sensuality and leading to a very quiet nervous breakdown."