John Travolta (Carrie) Carrie

Travolta played Billy Nolan before he was famous

John Travolta was cast as Billy Nolan -- Chris Hargensen's volatile boyfriend who kills the pig and rigs the bucket -- when he was a young television actor known primarily for his role as Vinnie Barbarino on Welcome Back, Kotter. Carrie was one of his earliest film roles, released a year before Saturday Night Fever (1977) made him a star. (wikipedia)

De Palma's casting of Travolta came through the same open audition process that produced the entire young ensemble. The joint De Palma-Lucas casting sessions were open to "any kid that wanted to come and try out," and Travolta's charismatic menace made him a natural fit for the blunt instrument Chris needed to execute her revenge. (indiewire)

Billy Nolan is dangerous alone but lethal when given direction

Travolta plays Billy as someone whose violence does not need a reason but benefits from a target. He drives recklessly, threatens his friends, and kills the pig with the sledgehammer when no one else will. Chris Hargensen understands how to weaponize him. Her whispered "Oh, Billy, I hate Carrie White" is not just a declaration -- it is an instruction manual. Billy already has the capacity for destruction; Chris gives him a direction and a deadline.

The performance is physical rather than psychological. Travolta communicates Billy's volatility through movement -- the reckless driving, the aggressive swagger, the brutal swing of the sledgehammer -- rather than through internal complexity. Billy has no inner life the film is interested in. He is the engine of the revenge plot, and Travolta plays him as exactly that.

Carrie launched a recurring collaboration with De Palma

Travolta reunited with De Palma five years later for Blow Out (1981), playing Jack Terry -- a performance many critics consider his finest dramatic work. The contrast between the two roles measures Travolta's range: Billy Nolan is a blunt instrument with no inner life; Jack Terry is a skilled craftsman whose decency makes his downfall devastating. De Palma cast Travolta in Blow Out because he had seen in Carrie an actor capable of more than the charm that would define his commercial career. See John Travolta for the Blow Out performance. (wikipedia)