These days, Michael Eavis can pick up the phone to pretty much any world star, ask them if they're free on the last weekend in June and expect them to drop whatever plans they have, don the wellies and hotfoot it over to Worthy Farm to play a few tunes.
But it wasn't always like this. As recently as the early nineties there were some - how do we say - fairly dubious headliners plying their wares, way before the days of glamping, 12 foot high security fences and round-the-clock BBC coverage.
Think you're a Glastonbury expert? See how much you know by spotting the odd one out in our headliner quiz - simply name the act that DIDN'T headline in the specified year.
Also, see our list of Glastonburys greatest ever Headliner Performances