Coldplay's Chris Martin reveals poignant reason he brought 'amazing' Michael J. Fox on stage during band's historic Glastonbury set amid the actor's battle with Parkinson's

Glastonbury fans were left in tears when Michael J. The Back To The Future actor, 63, played the guitar from his wheelchair, amid his battle with Parkinson's, with frontman Chris Martin, 47, poignantly crediting him for being the 'main reason' the group existed. Fox made a surprise appearance on stage with Coldplay on Saturday The Back To The Future actor, 63, played the guitar from his wheelchair, amid his battle with Parkinson's, with frontman Chris Martin, 47, poignantly crediting him for being the 'main reason' the group existed After Michael joined them in a renditions of their hits Fix You and Humankind, Chris told the crowd: 'The main reason why we're in a band is because of watching Back to the Future' Chris previously spoke about how seeing Michael on guitar playing Johnny B. Goode in one iconic scene from 1985's Back To The Future was his inspiration to become a musician. Chris previously spoke about how seeing Michael on guitar playing Johnny B. Goode in one iconic scene from 1985's Back To The Future was his inspiration to become a musician. Chris oozed confidence as he strutted about on stage alongside fellow band members Guy Berryman, Jonny Buckland, Will Champion, and performed some of the group's most famous hits The show was watched by a whopping crowd of 30K including Hollywood actor Tom Cruise, 61 Mission Impossible's Tom watched the the swanky VIP area with co-star Simon Pegg and Crown star Gillian Anderson Viewers at home were left stunned by the huge audience and branded it the festival's 'biggest ever' The set featured fireworks as well as confetti enveloping the crowd They made history after previously headlining the festival for a fifth time, pictured headlining in 2002 and 2005 Pictured on stage in Glastonbury in 2011 And their final headlining set in 2016 Writing: 'Michael J Fox joined Coldplay on stage oh my god': 'I love that Chris Martin from Coldplay brought Michael J Fox on stage, love Coldplay': 'Coldplay rocking Glastonbury and then bringing out Michael J.