Allison Howell Williams (born April 13, 1988) is an American actress. She first became known for starring as Marnie Michaels in the HBO comedy-drama series Girls (2012–2017), which earned her a Critics' Choice Award nomination. Her breakthrough came with the role of Rose Armitage in the horror film Get Out (2017), which earned her nominations from the MTV Movie Awards and the Screen Actors Guild Awards, among other accolades. She starred in the horror films The Perfection (2018) and M3GAN (2022), the latter of which she also executive produced. For her work in horror films, she has been deemed a scream queen by some in the media. Her latest on-screen appearance was in the role of Lucy Smith in Showtime's Peabody Award-winning miniseries Fellow Travelers (2023).

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