Billie Eilish is making history tonight as Glastonbury's youngest ever solo headliner, and she's definitely making a mark at the same time!

As the 'Happier Than Ever' singer took to the stage, she made a point of giving the crowd three poignant rules to follow.

So what are the three rules? We hear you ask. Well, the headliner simply said: "Don't be an a**hole, no judgement, have fun b**ch."