Emma Dumont (born Emma Noelle Roberts; November 15, 1994) is an American actress, model, and dancer. She is best known for her roles as Melanie Segal in the ABC Family series Bunheads, as Emma Karn on the NBC series Aquarius and as Polaris on the FOX series The Gifted. Description above from the Wikipedia article Emma Dumont, licensed under CC-BY-SA, full list of contributors on Wikipedia.