Didi Conn opened up to PEOPLE about the June 27 Grease sing-along at the Hollywood Bowl and why John Travolta showed up as ...

John Travolta's Danny Zuko reemerged at the Hollywood Bowl, 47 years after the star portrayed the Rydell High T-Bird in ...

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

John Travolta stepped back in time for a surprise appearance at a fan event. The actor, 71, attended a Grease sing-along at ...

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 ...

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

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

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 made a surprise appearance at a “Grease” sing-along at the Hollywood Bowl dressed up as his beloved character, ...

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

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