Julian Hilliard (born 2011) is an American actor, best known for his roles in television and film, including The Haunting of Hill House (2018), WandaVision (2021), and Doctor Strange in the Multiverse of Madness (2022), the latter two in which he portrayed Billy Maximoff in the Marvel Cinematic Universe. Born in Dallas, Texas, Hilliard is the son of actress Arianne Martin and director/writer/producer Justin D. Hilliard.