Grey's Anatomy
2005
Kelly J. McCreary (born September 29, 1981) is an American actress, best known for her role on the ABC drama series Grey's Anatomy as Dr. Maggie Pierce, the half-sister of series protagonist Meredith Grey. She joined the series as a guest at the end of the tenth season, becoming a series regular in the eleventh season. She has reprised her role on the spin-off series Station 19. Wikipedia