sentences:  His father later remarried, making Waterston the older half-brother of actresses Elisabeth Waterston and Katherine Waterston, and filmmaker Graham Waterston.Waterston studied at Yale, where he was a member of The Society of Orpheus and Bacchus, an all-male a cappella group.While still in college, but having already appeared in films and television, he formed the theater company Malaparte with numerous friends, including Ethan Hawke and Robert Sean Leonard.