Dead Ringers (1988)

Dead Ringers is a 1988 psychological drama and thriller starring Jeremy Irons in a dual role as identical twin gynecologists. Director David Cronenberg co-wrote the screenplay with Norman Snider; their script was based on the novel Twins by Bari Wood and Jack Geasland. The film is very loosely based on the lives of Stewart and Cyril Marcus.

More at Wikipedia.

Cast:

• Barbara Gordon — Danuta
• Damir Andrei — Birchall
• Geneviève Bujold
• Geneviève Bujold — Claire Niveau
• Heidi von Palleske — Cary
• Jeremy Irons
• Jacqueline Hennessy — Coral
• Jill Hennessy — Mimsy
• Jonathan and Nicholas Haley
• Lynne Cormack — Arlene
• Miriam Newhouse — Mrs. Bookman
• Nick Nichols — Leo
• Shirley Douglas — Laura
• Stephen Lack — Anders Wolleck