Amelia Frances Shepherd, M.D., F.A.C.S. is a fictional character on the ABC American television Grey's Anatomy medical drama and the spin-off series Private Practice, portrayed by Caterina Scorsone. In her debut appearance in season 3, Amelia visited her former sister-in-law, Addison Montgomery, and became a partner at the Oceanside Wellness Group. In July 2010, it was reported that she was promoted to series regular for season 4, after appearing in the final five episodes of season 3. She remained in the series until the final episode.