Rock-n-roll promoter Alan Freed holds a talent search to develop a new rock star, then must find the elusive, mystery contestant (Jimmy Clanton) who doesn't know he has won.

Alan Freed
as Himself

Jimmy Clanton
as Johnny Melody

Sandy Stewart
as Julie Arnold

Chuck Berry
as Himself

Jackie Wilson
as Himself

Ritchie Valens
as Himself

Jo-Ann Campbell
as Herself

Harvey Fuqua
as Harvey Fugua

Eddie Cochran
as Eddie Cochran

Jimmy Cavallo
as Jimmy Cavallo