Allison Williams (b. 1988) is an American actress, comedian, and singer. She is best known for her role as Marnie Michaels on the HBO comedy-drama series Girls, the titular role in NBC's "Peter Pan Live", and her performance in the Jordan Peele film Get Out. She is the daughter of Brian Williams.

Williams visited the set of Sesame Street to film a bit during production of Season 49.

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