Twenty years ago, long before Kings Of Leon became festival headliners, Caleb Followill made a deal with one of his friends. "He and I used to go to random bars, all over the world," says the singer.

Kings of Leon will be joined at BST Hyde ... Made up of brothers Caleb, Nathan and Jared Followill, along with cousin Matthew Followill, the band first found success in the UK, where, in 2003 ...

Kings of Leon dropped its ninth studio album, Can We Please Have Fun, on May 10, and two band members just joined Audacy ...

Olivia Rodrigo, Caleb Followill of Kings of Leon and Noah Kahan. CREDIT: Gilbert Flores/Billboard via Getty Images, Rick Kern/Getty Images for ABA, Derek White/Getty Images for American Express ...