HARRY Styles appeared as Stevie Nicks' surprise guest at tonight's BST Hyde Park gig.
The Sun had revealed Harry was on site and in the backstage area with Stevie and her band - wearing a mask out of respect for the strict Covid protocols.
The former One Direction star joined Stevie for her encore of Stop Dragging My Heart Around and Landslide.
The Adore You singer Harry, 30, has performed both tracks with Stevie before.
The pair were watched by a huge roaring crowd - including Kate Moss and her daughter, Kristin Dunst, Cara Delevigne, Charlotte Tilbury and Stella McCartney.
Stevie told fans she was playing Landslide in memory of her late bandmate Christine McVie - making it an emotional end to her hit show.
She said: "I want you to know that Christine was my girl and she loved all of us and today was her birthday."
"All of you have helped me get over her death and I want you to know how much I appreciate it."
She also paid tribute to Watermelon Sugar singer Harry for joining her on stage.
"Harry, I thank you," Stevie said.
"We thank you!"
An insider told The Sun earlier today: "Everyone backstage from runners to security is talking about Harry coming out for the encore.
"Earlier this evening entrances were blocked while a special VIP were driven on site - and Harry is now in Stevie's backstage area in a mask because of the Covid protocols.
"Harry's band are all here backstage too - which is adding to the furore.
"He has been in London for the past couple of days and he and Stevie are so close, it's only natural he'd want to come out on stage with her.
"The excitement at BST has reached fever pitch."
Harry first performed the track Landslide with Stevie as part of his Fine Line album launch concert in LA in 2020.
The pair took to the stage for the One Night Only at The Forum concert to an incredible response from the crowd.
However, it was years earlier in 2017 during one of Harry's LA gigs when the surprise pairing actually took to the stage for the very first time together.
Most famously, the unlikely duo belted out Stop Dragging My Heart Around at the 2019 Rock and Roll Hall of Fame Induction in one of the ceremony's most surprising moments to date.
Stevie found herself inducted into the prestigious music list the same year and chose the former One Direction star to help her celebrate live on stage.
At the time, Harry presented her with the incredible honour as he remarked that she was "the magical gypsy Godmother who occupies the in-between".
Harry and Stevie are understood to have first met backstage at a Fleetwood Mac concert in 2015.
He brought her a birthday cake by way of introducing himself to her.
