Hannah Gayle Marks (born April 13, 1993) is an American television and film actress.

Hannah Marks was born in Santa Monica, California, the daughter of Nova Ball, a former actress, and Robin Marks. Her maternal grandfather was entrepreneur and musician Ernie Ball and one of her maternal great-great-grandfathers was composer Ernest Ball. She appeared in the 2006 feature film Accepted as Lizzie Gaines as well as guest starred in many television programs such as Ugly Betty and CSI: Miami. She was featured in the cover story of the June 4, 2006 issue of The New York Times Magazine titled "Hollywood Elementary" with her friend Liana Liberato.

Marks played Tammy in The Runaways, a 2010 biographical film based on the 1970s all-girl rock band of the same name.