The Bee Gees scored five top 10 hits from the film's soundtrack
Robin Gibb of the Bee Gees has said he has never seen Saturday Night Fever all the way through, despite writing the film's seminal soundtrack.
"It's not that I can't watch it," he told BBC Radio 4's Front Row programme. "It's just that I'm restless."
The star even admitted he had walked out of the film's US premiere in 1977 after just 30 minutes.
Gibb will perform songs from the movie with Ronan Keating and Sharleen Spiteri at the Electric Proms this weekend.
The concert is being held to mark the 30th anniversary of the soundtrack reaching number one.
It will also feature Sam Sparro, Gabriella Cilmi and the BBC Concert Orchestra.
The record featured Bee Gees hits Stayin' Alive and How Deep Is Your Love alongside disco classics by the Trammps and Kool and the Gang.
But Gibb revealed that he and his brothers did not get to see any footage from the film before penning their contributions to the soundtrack.
"We didn't see the film until the premiere," he said, adding that he had only "lasted half an hour" in the cinema.
"That actually is par for the course, because a lot of actors will go into a premiere and then go out the exit."
Saturday Night Fever catapulted John Travolta to fame in 1977
The soundtrack to Saturday Night Fever is one of the biggest-selling albums of all-time, with more than 40m copies bought around the world.
It helped to usher in a second phase in the Bee Gees' career, where high falsetto disco grooves replaced the close-harmony pop of early hits such as Massachusetts and To Love Somebody.
The band have been inactive since the death of Maurice Gibb in 2003, but Robin hinted that he may reunite on stage with third brother Barry next year, when a musical based on their career launches.
"We are closer to that than we've ever been," he said. "It's definitely maybe."
The full interview with Robin Gibb can be heard on Radio 4's Front Row at 1915 BST (1815 GMT) on Friday, 24 October.