Jack is voiced by Chris Sarandon. Danny Elfman provided Jack's singing voice in the original film and soundtrack album, with Sarandon providing Jack's speaking and singing voice in subsequent productions.
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Corpse Bride's Victor and Frankenweenie's have pretty much the same character design, with pointy chins, really big eyes, thin noses, dark shadows around the eyes, and small mouths, but they aren't the same character.
Despite those similarities, Tim Burton actually had nothing whatsoever to do with Coraline's production. The filmmaker behind Coraline is Wendell & Wild director Henry Selick, but this hasn't stopped the beloved adaptation of the Neil Gaiman comic from being falsely attributed to Burton by far too many people.