He didn't wear the traditional wellies or camp down in the fields.
Still, ravers at Glastonbury, more used to seeing the likes of Kate Moss and Lily Allen in their midst, were surprised – and rather delighted - to see Prince Charles attending.
Mingling with the crowds, wearing a light summer suit, the heir to throne seemed to thoroughly enjoy the engagement to highlight the charities associated with the legendary festival.
As word spread of the visit, a crowd gathered, chanting "Charlie" and calling for him to "give us a wave" – and he happily obliged.
"I can't believe it," Ben Oakley, one of the onsite volunteers told The Guardian. "If we'd have known, we would have built him a mini Buckingham Palace."
Asked if he was enjoying his visit, Charles replied: "How could I not?"
Appearing in his capacity as president of Water Aid, the Prince took a tour of the site with organiser, Michael Eavis.
And later he had a go on the Water Aid's "welly shy", which involved throwing a tennis ball at a gumboot.
Zimbabwean dance and drum group Siyaya Arts also performed an exuberant show for him.
If Charles had stayed on longer he could have caught one of the acts – this year including rapper Snoop Dogg, Gorrillaz, Muse and Stevie Wonder.