Rebecca De Mornay (born August 29, 1962) is an American actress, born in Santa Rosa, California, USA, the daughter of Wally George. De Mornay grew up in France and went to college in the United Kingdom. She studied acting at the Lee Strasberg-Institute in New York (which also at one time included veterans Mickey Rourke, Robert De Niro and Christopher Walken). Her film debut came with a small part in Francis Ford Coppola's One from the Heart (1982), which was followed by the very successful Risky Business (1983) with Tom Cruise. That film propelled her into a short-lived period of super-stardom, which deteriorated slightly after she began taking lesser roles.

Her most successful film to date (2005) was The Hand That Rocks the Cradle (1992). In 2004, she guest starred as attorney Hannah Rose for the final few episodes of The Practice.