Jack Skellington, the main character of "The Nightmare Before Christmas," is voiced by the legendary actor Chris Sarandon. Sarandon brought a hauntingly beautiful performance to the character, capturing the essence of Jack's conflicted nature as the Pumpkin King. His voice, while slightly menacing, also carried a sense of wonderment and curiosity, perfectly encapsulating the duality of Jack's character. Sarandon's iconic voice is now an essential part of the "Nightmare Before Christmas" franchise.