Greta Celeste Gerwig is an American film director, screenwriter, actress, and producer. She was initially known for working on various mumblecore films, such as Baghead (2008) and Yeast (2008), in which she became an important figure in the movement. Since then she has expanded from acting in and co-writing independent films to directing major studio films. Gerwig was included in the annual Time 100 list of the most influential people in the world in 2018.