The band recently tweeted “Worst kept secret in rock and roll is now confirmed… see you at @GlastoFest on June 28th! #MetOnTour”
Glastonbury boss Michael Eavis gave a massive hint a few days ago describing the TBA act as ‘one of the biggest-selling bands in the world at the moment.’
Metallica will be headlining the second day of the festival and will be the first metal band to headline the festival.
The festival takes place at Worthy Farm on June 25 – 29.