| Name | Character | Episodes |
|---|---|---|
| Ellie Haddington | Nellie | 1 |
| Mark Williams | Father Christmas | 1 |
| Elizabeth Berrington | Terry | 1 |
| Dani Harmer | Young Jo | 1 |
| Niky Wardley | Angie | 1 |
| Jo Brand | Herself | 1 |
| Sinéad Keenan | Mrs Whitefield | 1 |
| Alison Steadman | Alison's Mother | 1 |
| Jason Watkins | Vince | 1 |
| Sanjeev Bhaskar | Papa | 1 |
| Lorraine Ashbourne | Miss Meadowcroft | 1 |
| Samuel Roukin | Dad | 1 |
| Alexa Davies | Hilary | 1 |
| Meera Syal | Herself | 1 |
| Kevin Doyle | Dick | 1 |
| Adlyn Ross | Old Woman | 1 |
| Catherine Tate | Josephine | 1 |
| Anita Dobson | Nan | 1 |
| Jane Horrocks | Hairdresser | 1 |
| Amelia Bullmore | Helen | 1 |
| Brid Brennan | Sister Mary Bernadette | 1 |
| Ayesha Dharker | Mama | 1 |
| Madhav Sharma | Uncle Satnam | 1 |
| Lauren McQueen | Alison | 1 |
| Madeleine Power | Young Catherine | 1 |
| Sophie Wright | Young Jane Horrocks | 1 |
| Louisa Connolly-Burnham | Susan Butler | 1 |