 John Travolta stars in Pulp Fiction this evening on Channel 4 at 10pm but long before he became the assassin Vincent Vega in Quentin Tarantinos action movie, the American star played Danny Zuko in the 1978 musical Grease. The legendary 50s movie starred him and the iconic Olivia Newton-John but she only joined ... John Travolta begged Olivia Newton-John to join Grease... 