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Rex Harrison is The Constant Husband in this delightful British comedy. It all begins when amnesia victim Charles Hathaway (Harrison) tries to reconstruct his past with the aid of psychiatrist Llewellyn (Cecil Parker). Our hero would have been better off had his memory remained lost: Llewellyn discovers that he's had seven wives -- simultaneously! Lady lawyer Chesterman (Margaret Leighton) tries to keep Llewellyn out of jail, though in fact he'd prefer incarceration to multiple matrimony. Of the seven spouses, Kay Kendall (the real-life Mrs. Rex Harrison) stands out with a sparkling comic characterization.