Best known for playing Kylo Ren in Star Wars and Adam Sackler on the hit HBO series Girls. In 2018 he starred in Spike Lee's BlacKkKlansman. Other notable film roles include Inside Llewyn Davis, Frances Ha, and This is Where I Leave You.
He joined the Marine Corps after the tragedy of September 11 and attended The Juilliard School.
He created a non-profit organization called Arts in the Armed Forces that puts on shows for the military.
He married longtime girlfriend Joanne Tucker in 2013.
He starred alongside writer/actress Lena Dunham on HBO's Girls.