Amelia Shepherd, M.D. is a fictional character on the ABC American television medical drama Private Practice, and the spinoff series' progenitor show, Grey's Anatomy, portrayed by Caterina Scorsone. In her debut appearance in season three, Amelia visited her former sister-in-law, Addison Montgomery, and became a partner at the Oceanside Wellness Group. After Private Practice ended its run, Scorsone recurred on the tenth season of Grey's Anatomy, before becoming a series regular in season eleven.