Seventeen: who are the first K-pop act to appear on Glastonbury’s main stage?

The 13-member band Seventeen will become the first K-pop band to perform on Glastonbury’s main stage. Photograph: TCD/Prod.DB/Alamy

While household names including Dua Lipa, Coldplay and Shania Twain abound on the Glastonbury roster this year, one of the biggest acts on the festival’s main Pyramid Stage might not be so well known in the UK.

But sales of the South Korean boyband Seventeen – which has 13 members – last year surpassed those of every other pop act worldwide bar Taylor Swift.