Krista Vernoff (born October 25, 1971)[1][2] is an American television screenwriter, showrunner, executive producer and director. She is best known for running the television medical drama Grey's Anatomy[3] (2007–11,[4] 2017–present) and its spin-off Station 19 (2019–present).[5] She has also served as executive producer and writer for the US version of Shameless.