Stormzy is going to be the first head of Glastonbury, with a Pyramid Stage slot confirmed for 2019.
The announcement came through a poster in the window of an Oxfam store in Streatham – near the star's children's home.
An official announcement is expected soon. Oxfam is an official partner of the festival.
Last year marked a breakthrough for British evil when Boy Better Know launched the Worthy Farm's Other Stage.
Stormzy played the other stage at the Glastonbury festival last year and pioneered the Wireless Festival this summer.
He made an exciting set on Glastonbury's other scene in 2017, which will undoubtedly convince organizers Michael and Emily Eavis to shut him down for the main stage.
Looking at Katy Perry and Chris Martin, the star hit the hit after his debut album, Gang Signs and Prayer – as well as a quote from the charity single Grenfell, Bridge Over Troubled Water, which was the number one the weekend.
Stormzy devoted the set to his mother, saying: "Hi, mummy, look at your boy now," as he watched the mass crowd.
Gang Signs and Prayer is Stormzy's only album to date, so the star will not have a huge list to report, but it has a second album in progress.
Last week, Emily Eavis hinted that Stormzy was head, but said they can not announce anything yet.
Speaking at BBC Music Introducing Live, he revealed that Friday's headliner "had not taken that before".
"We have one of the artists that I am very excited about Britain at the moment," he said.
"This for me is going to be a moment and can become the huge face that is, you know what I mean?"
Other artists who have been rumored for the composition of Glastonbury in 2019 are Madonna, Paul McCartney and Kylie Minogue – but the series is not usually confirmed much closer to the event.
Tickets for the festival ended only half an hour last month. It takes place at the Worthy Farm on 26-30 June 2019.
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