Jason Ralph (born April 7, 1986) is an American actor and theater producer. Ralph began his career in theater, most notably performing in Peter and the Starcatcher on Broadway and off-Broadway and producing The Woodsman. From 2015 to 2019, he starred as Quentin Coldwater in the Syfy television series The Magicians. He has also had recurring roles on shows including Aquarius and Younger. And and is married to actress Rachel Brosnahan.