Bill Wyman is set to make 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.

Bill will performing on bass for two songs on stage with Micki Free American Horse following a request from Micki. Bill says he is set to appear on June 26, between 3-4pm.

As well as Micki Free American Horse, the line-up over the three-day Hard Rock Calling event includes 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