Twins! Rivals! Clones! Hollywood is doubling down on dual roles

For years, dual roles have been played largely for laughs. Think of Adam Sandler's Razzie-sweeping twin turn in Jack and Jill, or Lisa Kudrow as both Phoebe and Ursula Buffay on Friends. Eddie Murphy was always particularly prolific, his most multiplicitous performance as a clutch of Klumps for Nutty Professor II. There are exceptions, of course. But for every Legend or The Prestige there are ten Austin Powers, Bowfingers and – shudder – Norbits.