Bill Wyman performed with the Micki Free American Horse band at Hard Rock Calling in Hyde Park in London in front of thousands of fans. See the behind-the-scenes photo gallery with these shots, some taken by Bill and Suzanne Wyman.

Bill Wyman made a special guest appearance at this year's Hard Rock Calling event in Hyde Park in London on June 26, in support of his friend Micki Free's band American Horse.

See the Hard Rock Calling photo gallery

Bill performed on bass for two songs on stage with Micki Free American Horse following a request from Micki. As well as Micki Free American Horse, the line-up over the three-day Hard Rock Calling event included Pearl Jam, Stevie Wonder, Paul McCartney, Elvis Costello and Crosby, Stills and Nash.

Find out more about Hard Rock Calling

Find out more about Micki Free's American Horse