Via Starwars.com:

When actors travel to the galaxy far, far away, many of them like to stick around. Of course you know the actors that have made return appearances, playing the same role in two, three, four, six, and soon even seven films. But who you may not know are the actors that have come back assuming new identities. Here are four that have made an impact playing multiple characters in the Star Warscanon.

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