Peter Frampton's summer Guitar Circus tour continues to add special guests.

In addition to the previously announced B.B. King, Robert Cray and Sonny Landreth, he will now be joined on select dates by Rick Nielsen, Kenny Wayne Shepherd, Steve Lukather, Steve Cropper, Dean DeLeo from Stone Temple Pilots, Don Felder, Vince Gill, David Hidalgo of Los Lobos, Davy Knowles, Roger McGuinn, Richard Thompson, Vernon Reid of Living Colour and Vinnie Moore from UFO.

The tour starts May 28th in Nashville and runs through August 31st in Paso Robles, California.