| Name | Character | Episodes |
|---|---|---|
| Jaime Murray | Natalie Brown | 18 |
| Michael Landes | 18 | |
| Tamsin Greig | Alice Chenery | 18 |
| Trudie Styler | 18 | |
| Joanna Page | Heather | 18 |
| Sheridan Smith | Cleo Martin | 18 |
| Owen Brenman | 18 | |
| Tom Ellis | 1 | |
| Indira Varma | 1 | |
| Olivia Colman | Penny | 1 |
| Elizabeth Spriggs | Penny's Mother (voice) | 1 |
| Richard Lumsden | 1 | |
| Mackenzie Crook | 1 | |
| Sanjeev Bhaskar | 1 | |
| Abigail Thaw | 1 | |
| Ron Donachie | 1 | |
| Rebecca Front | 1 | |
| Joanna Page | 1 | |
| Adam James | 1 | |
| Justin Edwards | 1 | |
| Rufus Jones | 1 | |
| Ronnie Corbett | 1 | |
| Darren Boyd | 1 | |
| Doreen Mantle | Mavis Bledsoe | 1 |
| Suzanne Bertish | 1 | |
| Geraldine Alexander | 1 | |
| Andrea Lowe | 1 | |
| Kevin Bishop | 1 | |
| Sarah Hadland | 1 | |
| Rhashan Stone | 1 | |
| John Fortune | 1 | |
| Mina Anwar | 1 | |
| Scott Major | Keith | 1 |
| Katie Sheridan | Teenage Girl | 1 |