She shares a son with her fiancé, actor Joaquin Phoenix. Kate Mara Steps Out with Husband Jamie Bell and Sister Rooney Mara at L.A. Fundraiser for Chimpanzee Rescue Watch Joaquin Phoenix Sweetly ...

a red-carpet dress, or a street-style outfit, she knows chooses ageless looks appropriate for her age. Along with sister Rooney Mara, Kate Mara is style personified.