Emma Dumont (born 1994 or 1995), is an American actress, model, and dancer. She is known for her roles as Melanie Segal in the ABC Family series Bunheads, Emma Karn in the NBC series Aquarius, Lorna Dane/Polaris in the FOX series The Gifted, and Jackie Oppenheimer in the Christopher Nolan biographical thriller Oppenheimer (2023).