Metallica have responded to Mogwai describing them as "shit" after they were announced as Glastonbury headliners, asking: "What? Who are you?"
The band were announced as the third headliners of the festival last month, and the announcement was met with an extremely mixed reaction.
Speaking to Metal Hammer, Ulrich has responded to the criticism, saying: "We're fairly thick-skinned and just kind of turn a blind eye to it, but obviously if Mick Jagger has something to say, or Alex Turner, or the very nice guys in Kasabian, who I love, it's cool."
He continued: "But at some point, if some guy in some other band... it's like, 'Huh? What? Who are you?' At some point it becomes a little bit ridiculous."
This year's Glastonbury festival will be headlined by Kasabian, Arcade Fire, and Metallica, and takes place 25 - 29 June. Tickets have already sold out.