The 44-year-old actress recently sat down with former Grey's Anatomy co-star Ellen Pompeo, 53, for a candid conversation for Variety's Actors on Actors series. During the conversation, Katherine, who left the widely-loved medical drama series in 2010, opened up about how she felt after her exit from the show, following rumours of on-set feuds and a reputation for being difficult to work with. "I was up here in my head, in my gut, in my mind, in my life. I was just vibrating at way too high of a level of anxiety.”