Harley Quinn Smith (born June 26, 1999) is an American actress and musician. She appeared in the movies Tusk and Yoga Hosers, both written and directed by her father, Kevin Smith. She also had a small role in Quentin Tarantino Once Upon a Time in Hollywood, playing a member of the Manson Family.
She is also the bass player and one of the singers in the bubblegum punk band The Tenth.
She was named after the female Batman character Harley Quinn.
Smith is bisexual.