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

John Travolta, who starred as 'Grease' bad boy heartthrob Danny Zuko, crashed the Hollywood Bowl's sing-along event Friday.

Fans at the Grease Sing-A-Long screening at the Hollywood Bowl last night got a surprise when the original Danny Zuko ...

John Travolta made a surprise appearance at Friday night’s “Grease” sing-a-long at the Hollywood Bowl dressed as his iconic ...

John Travolta gave "Grease" fans the thrill of their lives when he dressed up as Danny Zuko for a surprise appearance at a ...

John Travolta appeared live on stage at the Hollywood Bowl on Friday June 27 at a Grease Sing-A-Long event. But fans loved ...

The clip showed the “Pulp Fiction” alum walking out as the crowd went wild before Travolta joined his stunned “Grease” ...

Summer nights are in full swing. And to kick off the season, John Travolta made a surprise appearance at a “Grease” sing-along at the Hollywood Bowl in Los Angeles on Friday night. The actor ...

Grease fans were treated to a surprise they’ll never forget when John Travolta showed up in character as Danny Zuko—leather ...

The Hollywood Bowl’s Grease sing-a-long event was automatic, systematic, hydromatic and grease lightning — thanks to a very ...

John Travolta pulled out the hair gel and leather to revive his role as Danny Zucco in a Hollywood Bowl screening of "Grease." ...