The musical follows the relationships of what at first seems like two different couples separated by a span of time; one couple is getting married and the other is getting divorced. It turns out they are actually the same couple at two points in their relationship—a decade apart.
| Actor | Role |
|---|---|
 Samantha BarksCatherine | Catherine |
 Ramin KarimlooBill | Bill |
 Omid DjaliliNot listed | Not listed |
 Joan CollinsAnna | Anna |
 Fleur EastNot listed | Not listed |
 George MaguireNot listed | Not listed |
 Harriet ThorpeNot listed | Not listed |
 Anita DobsonNot listed | Not listed |
 Henry GoodmanNot listed | Not listed |
 Adwoa AkotoNot listed | Not listed |
| OOliver SavileNot listed | Not listed |
 Tyrone HuntleyNot listed | Not listed |
| AAnn MicklethwaiteNot listed | Not listed |
 Neil HurstNot listed | Not listed |
| OOliver ClaytonNot listed | Not listed |