Dead Ringer (1964) Bette Davis, Karl Malden, Peter Lawford, Philip Carey

Identical twin sisters Margaret (Bette Davis) and Edith Philips (also Davis) haven t spoken in nearly 20 years, ever since Margaret hoodwinked the man Edith loved into marrying her instead. When Margaret s husband dies, Edith reunites with her twin but only to seek revenge. Killing her sister and stealing her identity, Edith has everyone convinced she s really Margaret. But when she encounters Margaret s lover, Tony (Peter Lawford), Edith uncovers a shocking secret that threatens her plans.