The brothers Gibb perform their greatest hits from the 60's, 70's, 80's and 90's including many songs written for and made hits by other artists but never recorded by the Bee Gees themselves.
| Actor | Role |
|---|---|
 Barry GibbSelf - Guitar, Vocals | Self - Guitar, Vocals |
 Maurice GibbSelf - Keyboards, Guitar, Vocals | Self - Keyboards, Guitar, Vocals |
 Robin GibbSelf - Vocals | Self - Vocals |
 Alan KendallSelf - Lead Guitar | Self - Lead Guitar |
 Stephen GibbSelf - Guitar | Self - Guitar |
 Ben StiversSelf - Keyboards | Self - Keyboards |
 Steve RuckerSelf - Drums | Self - Drums |
 Matt BonelliSelf - Bass Guitar | Self - Bass Guitar |
 Céline DionSelf | Self |
 Olivia Newton-JohnSelf - Audience member | Self - Audience member |
 Chloe LattanziSelf - Audience member | Self - Audience member |
 Andy GibbSelf (archive footage) | Self (archive footage) |
 Frankie ValliSelf (archive footage) | Self (archive footage) |
 John TravoltaSelf - Tony Manero/Self - Danny Zuko (archive footage) | Self - Tony Manero/Self - Danny Zuko (archive footage) |