Private Practice is a spin-off of the highly popular ABC series, Grey's Anatomy starring Kate Walsh as Dr. Addison Forbes Montgomery, a renowned neonatal surgeon. After realizing that her life isn't advancing at Seattle Grace, Addison packs her bags and heads off to Santa Monica to start a new life. She reunites with her newly divorced med school friends, Naomi (Audra McDonald) and Sam (Taye Diggs), and joins them in their chic private practice.