| Wayne Smith | Neil Sedaka |
| Julia Farino | Eleanor Sedaka |
| Simon Connolly | Mac Sedaka/Burt Bacharach |
| Jade Sampson | Ronnie Sedaka |
| Edward Handoll | Howie |
| Anna Clayton | Leba |
| Caroline Dennis | Aunt Ann/Mrs Grenfield/Mrs Strassberg |
| Natalie Hope | Aunt Kate/Carole King/Mrs Glantz |
| Carla Freeman | Aunt Molly/Connie Francis/Cynthia Weil |
| Alastair Natkiel | Don Kirshner/Mr Lass/Hal David |
| Kieran Brown | Elton John/Norman/Tony Christie |
| Charlie Adams | David/Stoller/Messenger |
| Jody Crosier | Seymour/Professor/Barry Manilow |
