William Thomas Hader Jr. is an American actor, director, screenwriter, and comedian. He was a cast member on the NBC sketch comedy series Saturday Night Live from 2006 to 2013, for which he received four Primetime Emmy Award nominations and a Peabody Award. He became known for his impressions and especially for his work on the Weekend Update segments, where he played Stefon Meyers, a flamboyant New York City nightclub tour guide.