Screen icon John Travolta made a surprise appearance at a "Grease" sing-a-long at the Hollywood Bowl this weekend.

John Travolta gave "Grease" fans the thrill of their lives when he dressed up as Danny Zuko for a surprise appearance at a screening of the hit 1978 movie musical. The 71-year-old actor shared a pic on Instagram that showed him wearing a leather jacket and a slicked-back pompadour to make a cameo at a June 27 "Grease" sing-along at the Hollywood Bowl in Los Angeles.

John Travolta is returning to one of the biggest roles of his career. The actor and '80s icon surprised audiences at the Hollywood Bowl this past Friday, coming out dressed as Danny Zuko right before the sing-along screening of "Grease.