Michael J. Fox makes surprise appearance with Coldplay at music festival: ‘Mind blowing’ experience

Michael J. Fox joined Coldplay on stage at the Glastonbury Festival in the U.K. for a surprise appearance on Saturday.

The "Back to the Future" star shared photos from the event on Instagram, thanking the band for the experience.

"My team: Lauren, John and Jeff and Steve… Glastonbury all the love and thanks to the @coldplay team who took such great care of us. And many thanks to Chris, Will, Johnny, Guy and Phil," Fox wrote in the caption.

He continued, "Oh yeah in case you were wondering… it was f---ing mind blowing.