Aaron Tveit Cast as Danny Zuko in Fox’s ‘Grease’ Musical. Aaron Tveit has been cast as head T Bird Danny Zuko in Fox’s musical version of “Grease,” it is the word. The Paramount Television production is based on the original musical “Grease” by Jim Jacobs and Warren Casey, and Paramount Pictures’ 1978 feature adaptation. The film famously cast John Travolta as bad boy rebel Danny, who was hopelessly devoted to the sweet and innocent Sandy (played by Olivia Newton-John).