Emma Halleen is an American born, British actor with citizenship in both countries.

Her feature debut was at Tribeca Film Festival, playing the role of August Blanco Rosenstien's tomboy, little sister in "Downtown Owl", a movie co-directed by Lily Rabe and Hamish Linklater that starred Ed Harris, Vanessa Hudgens and Henry Golding (2024). She is best known for her role as Shelby Brubaker on "American Horror Stories" Season 3 (2023). Emma studies with Charles Carpenter at Storyteller's Conservatory and has studied at Royal Academy of Dramatic Arts (RADA) in their Advanced Acting Fundamentals program.