Dead Ringers is a 1988 psychological thriller film starring Jeremy Irons in a dual role as identical twin gynecologists. David Cronenberg directed and co-wrote the screenplay with Norman Snider. Their script was based on the lives of Stewart and Cyril Marcus and on the novel Twins by Bari Wood and Jack Geasland, a "highly fictionalized" version of the Marcuses' story.

Jeremy John Irons is an English actor and activist. He is known for his roles on stage and screen having won numerous accolades including an Academy Award, two Golden Globe Awards, three Primetime Emmy Awards, and a Tony Award. He is one of the few actors who has achieved the "Triple Crown of Acting" having won Oscar, Emmy, and Tony Awards for Film, Television and Theatre.