American actress, comedienne, and musician. She stars as Marnie Michaels on the HBO television series Girls.
Williams was born in Connecticut, and is the daughter of Jane Gillan Stoddard, a TV producer, and NBC Nightly News anchor Brian Williams. Williams was raised in New Canaan, Connecticut. She attended Greenwich Academy and graduated in 2006. After she attended Yale University and graduated in 2010 with an English degree. While at Yale, Williams was a member of the improv comedy troupe Just Add Water for four years, as well as being a part of the YouTube web series College Musical, and was inducted into St. Elmo