Katherine Boyer Waterston (born March 3, 1980) is an American actress. Waterston made her feature film debut in Michael Clayton (2007). She followed this up with supporting roles in films including Robot & Frank (2012), Being Flynn (2012) and The Disappearance of Eleanor Rigby: Her (2013) before her leading role in Inherent Vice (2014). In 2015, she portrayed Chrisann Brennan in Steve Jobs. She will star in the 2016 film adaptation of J.K. Rowling's book, Fantastic Beasts and Where to Find Them.