Grease Cast Nearly 50 Year's Later: Revisiting John Travolta's Iconic Breakout

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To pinpoint John Travolta's exact age during the making of Grease, the production calendar provides the clearest math. Principal photography commenced on June 27, 1977, and wrapped in September of that year. Born on February 18, 1954, in Englewood, New Jersey, Travolta was exactly 23 years and 4 months old when cameras began rolling. When Paramount Pictures released the film on June 16, 1978, he had turned 24.

Travolta was far from a novice when he suited up as Danny Zuko. He had already logged hundreds of stage hours playing the supporting role of Doody in the national touring company and on Broadway earlier in the decade. That background gave him an intimate familiarity with Jim Jacobs and Warren Casey's music. By the time producer Allan Carr and Paramount tapped him for the lead, Travolta was already an American household name thanks to his comedic role as Vinnie Barbarino on ABC's Welcome Back, Kotter.

The timing proved remarkably serendipitous. Paramount shot Grease while Saturday Night Fever sat in post-production. When Fever debuted in December 1977, Travolta skyrocketed from television sitcom darling to Oscar-nominated dramatic phenomenon practically overnight. By the time audiences lined up around city blocks for the June 1978 premiere of Grease, Travolta had transformed into the single most bankable young actor on the planet.