McFly have played the 'secret special guests' slot at Slam Dunk Festival 2021 in Hatfield.
It was all about the chart-topping 5 Colours in Her Hair and Star Girl band on The Key Club Stages in Leeds' Temple Newsam on Saturday afternoon.
McFly posted a picture of themselves on stage at Slam Dunk on their Instagram with the words: "SURPRISE! What’s up @slamdunkmusic"
After their Leeds set, and before heading south to Hatfield for part two of Slam Dunk 2021, McFly posted: "Wow, that was some serious energy at @slamdunkmusic today. How many crowd surfers can we get tomorrow?"
The band played the same Slam Dunk stage at the festival's South leg in Hatfield Park on Sunday, September 5.
The appearance by Strictly Come Dancing 2021 contestant Tom Fletcher, Danny Jones, Dougie Poynter and Harry Judd was kept secret with the line-up poster just saying 'special guests'.
Slam Dunk Festival posted on its Instagram page on Saturday: "SLAM DUNK NORTH! It's all about you💙 A big thank you to our special guests @mcflymusic for a huge moment on @thekeyclubleeds stage!"
McFly's spot at the festival comes two years after Busted played a secret set at Slam Dunk Festival 2019 in Hatfield and Leeds.
Slam Dunk Festival South 2021 takes place in Hatfield Park, Hertfordshire, on Sunday, September 5.
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