Mick Jones, lead guitar, keyboards and background vocals ; Lou Gramm, lead vocals and percussion ; Dennis Elliott, drums and background vocals ; Rick Wills, bass guitar and background vocals ; Tom Dolby, main synthesizers ; Mark Rivera, saxophone on "Urgent" (except solo) and "Break it up" ; Hugh McCracken, slide guitar on "Girl on the moon" ; Jr. Walker, saxophone solo on "Urgent" ; Larry Fast, sequential synthesizer on "Break it up," "Don't let go" and "Juke box hero" ; Michael Fonfara, keyboard textures on "Urgent" and "Girl on the moon" ; Bob Mayo, additional keyboard textures on "Waiting for a girl like you" and "Break it up" ; Ian Lloyd, "Mutt" Lange and Mark Rivera, background vocals.

Produced by Robert John "Mutt" Lange and Mick Jones.

Recorded at Electric Lady Studios, New York City, New York ; Chief engineer: Dave Wittman ; Basic tracks engineered by Tony Platt ; Second engineer: Brad Samuelson ; Assistant engineers: Michel Sauvage and Edwin Hobgood.