Their Adam Driver musical sent Cannes into raptures and Edgar Wright has made an all-star documentary about them. The Mael brothers explain why they’ll always be hopelessly in love with pop

In 1974, John Lennon was startled as he was watching Top of the Pops. He rang Ringo Starr. “You won’t believe what’s on television,” he reportedly said. “Marc Bolan is playing a song with Adolf Hitler.”

This was Sparks, performing their glorious pop opus This Town Ain’t Big Enough for Both of Us. “It was equidistant between the Beatles on Ed Sullivan and the Daleks on Doctor Who,” says Edgar Wright, the director of Baby Driver and Shaun of the Dead, and now a documentary about the duo, The Sparks Brothers. “Fifteen million people saw it. Think of the next generation of bands watching: the Sex Pistols, Siouxsie and the Banshees, Duran Duran, Joy Division, Squeeze, Vince Clarke. They’re all watching and they’re all thinking the same thing.”