The biography of former Beatle, John Lennon—narrated by Lennon himself—with extensive material from Yoko Ono's personal collection, previously unseen footage from Lennon's private archives, and interviews with David Bowie, his first wife Cynthia, second wife Yoko Ono and sons Julian and Sean.
| Actor | Role |
|---|---|
 John LennonSelf (archive footage) | Self (archive footage) |
 Yoko OnoSelf | Self |
 Paul McCartneySelf (archive footage) | Self (archive footage) |
 George HarrisonSelf (archive footage) | Self (archive footage) |
 Ringo StarrSelf (archive footage) | Self (archive footage) |
 David BowieSelf | Self |
 Phil SpectorSelf (archive footage) | Self (archive footage) |
 Cynthia LennonSelf | Self |
 Julian LennonSelf | Self |
 Sean Ono LennonSelf | Self |
| AAl CappSelf (archive footage) | Self (archive footage) |
 May PangSelf | Self |
 George MartinSelf | Self |
 Elliot MintzSelf | Self |
 Allan WilliamsSelf | Self |
 John F. KennedyNot listed | Not listed |
 Bob DylanNot listed | Not listed |
 Linda McCartneyNot listed | Not listed |
 Pattie BoydNot listed | Not listed |
 Klaus VoormannSelf (archive footage) | Self (archive footage) |
 Alan WhiteSelf (archive footage) | Self (archive footage) |
 Jack PalanceSelf | Self |
| GGloria EmersonNot listed | Not listed |
 Salvador DalíSelf (archive footage) | Self (archive footage) |
 Elton JohnSelf (archive footage) | Self (archive footage) |