Dan Gurewitch is a writer, actor and comedian. He currently writes for "Last Week Tonight with John Oliver" on HBO, for which he has won an Emmy and a WGA Award. Previously, he was a senior sketch writer and performer at CollegeHumor. Dan has studied improvisation at the UCB Theatre under Chris Gethard, Jason Mantzoukas, Anthony King, Billy Merritt, Doug Moe, Jackie Clarke and others. He is an alum of the Harold teams Whorenado and The Bishop, and is an occasional sketch comedy teacher at the theatre.