John Travolta, who starred as 'Grease' bad boy heartthrob Danny Zuko, crashed the Hollywood Bowl's sing-along event Friday. He surprised the audience and "Grease" co-stars alike.

The 71-year-old star stunned fans at a Grease sing-along, marking his first return as Zuko since Olivia Newton-John’s passing ...

You never know what’s going to happen on those summer nights at the Hollywood Bowl. On Friday night, the iconic venue hosted the “Grease” sing-along screening. The event reunited ...

Legendary actor John Travolta recently surprised fans by dressing up as Danny Zuko from the classic 1978 film ‘Grease.’ ...

John Travolta made a surprise appearance at Friday night’s “Grease” sing-a-long at the Hollywood Bowl dressed as his iconic drag racing, hip swinging 1950s bad boy Danny Zuko. “Tonight at the ...

John Travolta is tapping into our nostalgia. The actor, 71, made a surprise appearance at Friday’s “Grease” sing-a-long at ...

Danny and Sandy finally get their movie-ending 'Grease' kiss, 40 years after it was cut Travolta wasn't the only "Grease" star who dropped in for the Hollywood Bowl showing.

Fans at the Grease Sing-A-Long screening at the Hollywood Bowl last night got a surprise when the original Danny Zuko strutted out onstage.. John Travolta posted a photo of himself in character ...

John Travolta made a surprise appearance at Friday night’s “Grease” sing-a-long at the Hollywood Bowl dressed as his iconic drag racing, hip swinging 1950s bad boy Danny Zuko.

“Tonight at the Hollywood Bowl, for the first time I surprised everyone at the GREASE Sing-A-Long and dressed up as Danny Zuko. No one knew. Not even the cast,” Travolta revealed in his post.

John Travolta, at 70, surprised the Hollywood Bowl audience during a 'Grease' sing-along by appearing as Danny Zuko. His unannounced entrance, complete with a blond wig, sparked a standing ovation ...