It’s nearly time for one of the biggest musical events of the year - as 135,000 people pack into Worthy Farm for the Glastonbury Festival.
They’ll see headliners The 1975, Olivia Rodrigo and Neil Young, along with hundreds of other acts across over 100 stages.
But looking at the schedule on the official website, music fans will see numerous timeslots with ‘TBA’ next to them - with no indication of who will be playing.
It could be a global megastar, or some busker from down the road on an acoustic guitar. Such is the joy of the festival.
There are some big gaps to be filled - on Friday there’s 11.30am on the Woodsies Stage, 4.55pm on the Pyramid Stage, and 8.30pm on the BBC Introducing Stage.
On Saturday, expect plenty of interest about who exactly ‘Patchwork’ are - third on the Pyramid Stage bill. Meanwhile there will be surprises for prime spots on the Park Stage at 7.30pm and the Shangri-la Stage at midnight.
On Sunday, those opting to go to the BBC Introducing Stage at 8.30pm could be in for a treat (or not).
The bookies reckon they have a fair idea of who will be playing the secret slots - here are their 11 favourites, according to online bookmaker, Betway.
Mike Reading, spokesperson at Betway, said: “Glastonbury is known for its surprise secret slots, with the likes of Lady Gaga, Foo Fighters, and George Ezra popping up unannounced over the years. Everyone’s talking about what acts could surprise the crowds at Worthy Farm this year, and with not long to go until the gates open, Glastonbury organisers still have it tightly under wraps.”

5. Robbie Williams - 2/1
Also priced at 2/1 to play a secret set at Worthy Farm is Robbie Williams. Robbie is currently touring with a huge stadium show, earning praise from fans and critics alike. He's not doing anything else on the weekend of Glastonbury, where he last performed back in 1998. His new album Britpop features the singer at Glastonbury in 1995, when he famously hung out with Oasis and acter in a manner not approved of by his Take That paymasters. | Getty Images

6. Sam Fender - 5/1
Sam Fender has a pakced schedule this year, with numerous festival outings and plenty of big outdoor UK gigs on his 'People Watching' tour - including at Edinburgh's Royal Highland Showgrounds. He seems to be free on Glastonbury weekend, and is match-fit - explaining why he's one of the favourites with the bookies, priced at 5/1. | Getty Images for Coachella

7. Lorde - 5/1
New Zealand singer Lorde's Lorde's fourth studio album, entitled 'Virgin', will be released on the Friday of Glastonbury - so what better way to celebrate than at the world's most famous festival? She told BBC DJ Jo Whiley that she'd like to, saying: "I'm quite tempted by what's going on because I've got lots of friends playing as well. We'll see if I can pull some strings and get there". She's also a 5/1 shot for Glastonbury. | Getty Images

8. Lady Gaga - 16/1
Remarkably superstar Lady Gaga has only appeared once at Glastonbury - relatively early in her career in 2009. Some have suggested that this could be the year for a triumphant return - the bookies reckon she's a 16/1 shot. | Getty Images for The Recording A
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