The UK's iconic pop group reunite on stage to commemorate over 20 years of their remarkable journey, in this performance special that features exclusive backstage moments.
| Actor | Role |
|---|---|
 CherylSelf | Self |
 Nadine CoyleSelf | Self |
 Kimberley WalshSelf | Self |
 Nicola RobertsSelf | Self |
 Sarah HardingSelf (archive footage) | Self (archive footage) |