The Best Movies Starring Actors in Dual Roles

Robert De Niro‘s latest movie, “The Alto Knights,” gives the Oscar winner twice as many roles as usual. Directed by Barry Levinson and written by “Goodfellas” writer Nicholas Pileggi, the film charts the real-life power struggle between 1950s Mafia bosses Vito Genovese and Frank Costello as it spirals into an all-out, blood-on-the-streets conflict. De Niro plays both Genovese and Costello in the drama, which also stars Debra Messing and “Shōgun” breakout Cosmo Jarvis.

De Niro is not...