Skład:

Electric Light Orchestra:
Jeff Lynne – lead vocals (except on „Xanadu”), backing vocals, electric guitars, acoustic guitars, keyboards, synthesizers
Bev Bevan – drums, percussion, tympani
Richard Tandy – pianos, synthesizers, keyboards
Kelly Groucutt – bass guitar, backing vocals

Gościnnie:
Olivia Newton-John – lead vocals on „Xanadu”
Strings by Louis Clark

Olivia Newton-John:
Olivia Newton-John – lead vocals, backing vocals
John Farrar – electric guitars, synthesizers, backing vocals
David Hungate – bass guitar on „Magic” and „Suspended in Time”
David McDaniel – bass guitar on „Suddenly”
Ed Greene – drums, percussion (except on „Magic”)
Carlos Vega – drums, percussion on „Magic”
Jai Winding – electric piano on „Suddenly”
Michael Boddicker – vocoder on „Suddenly”

Gościnnie:
Cliff Richard – co-lead vocals on „Suddenly”
Fee Waybill – co-lead vocals on „Dancin’”
Roger Steen – guitars on „Dancin’”
Bill Spooner – guitars on „Dancin’”
Michael Cotten – synthesizer on „Dancin’”
Gene Kelly – co-lead vocals on „Whenever You’re Away from Me”
Lou Halmy – whistling on „Whenever You’re Away from Me”
Strings arranged and conducted by Richard Hewson