Los Angeles, June 29 -- Actor John Travolta, in a nostalgic fever dream, made a surprise appearance on Hollywood Bowl during the Friday screening of his classic 1978 film 'Grease', dressing up as his iconic 50's leather-clad black boy dancer protagonist 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," Travolta wrote in an Instagram post Saturday, sharing a video of his appearance, reports Variety. "No one knew. Not even the cast. Thank you for a great evening."



In the video, the 71-year-old walked up the stage in full swag dressed up as the classic character, with the packed Hollywood Bowl erupting in cheers. Travolta then greeted the othe...