ABC medical drama Grey’s Anatomy is beefing up its ranks in a major way following the recent exit of original cast member Sandra Oh. Oscar winner Geena Davis has been tapped for a major guest arc on the medical drama’s upcoming eleventh season. She will be playing a surgeon at Grey Sloan Memorial Hospital. It is unclear whether Davis’ character will fill the void left by Cristina Yang’s (Oh) move to Zurich. Grey’s kept the question of who would replace Christina open in the Season 10 finale. This marks Davis’ return to ABC where she toplined the White House drama Commander In Chief. Davis is repped by CAA and Management 360.