TIME: This weekend means it’s officially been 40 whole years since the T-Birds and Pink Ladies first danced and sang their way into our hearts, but we’re still hopelessly devoted to Grease.
When Grease, the movie based on the hit Broadway musical, made its big screen debut in 1978, it was the highest grossing film of the year. Today, it remains the second most-successful movie musical of all time, according to Box Office Mojo, having only recently been ousted from the top spot by Disney’s Beauty and the Beast live-action reboot.
From Olivia Newton John’s good girl Sandy to John Travolta’s greaser Danny, Time takes a at what the cast of the beloved ’50s nostalgia flick is doing.