The average age of a Glastonbury headliner is still well into their 40s - despite 20-year-old Billie Eilish trying to bring the average down this year. The average age of the headliners this year is 45 years and two months, a slight drop from 49 years and one month when the festival last went ahead in 2019.
Paul McCartney is the one bringing the years of experience, and will be the oldest headliner ever at Glastonbury when he performs a week after turning 80. Sunday night headliner Kendrick Lamar will be closer to this year's average, having turned 35 10 days before. Generally, the average of headliners has been increasing.
In 1997, it was 26 years and five months, with nearly every member of The Prodigy, Radiohead, and Ash in their 20s. Between 1998 and 2008, the average crept up into the 30s.