Michael J. Fox makes surprise appearance with Coldplay at Glastonbury Festival

It was a blast from the past when actor Michael J. Fox made a surprise appearance at the Glastonbury Festival, playing guitar during Coldplay's "Fix You." 

Video shared by CBS News partner BBC showed Chris Martin directing the spotlight to the retired "Back to the Future" actor as he appeared on stage. Fox, in a wheelchair, played a guitar in his lap. 

Martin then told the crowd Fox had been key in Coldplay coming together.