| Mr. | Andersen | An author. |
| Monsieur | Antoine | A hairdresser. |
| Mrs. | Asquith | Beatrice's acquaintance. |
| Lord | Bath | The 7th Marquess of Bath. |
| Cecil | Beaton | A British photographer, designer, socialite, writer. |
| Basil | Blackwood | Maureen's husband. aka: Duff. |
| Lady | Brenda | Duff's mother. |
| Mrs. | Burke | Felicity's mother. |
| Richard | Butler | Hughie's friend. |
| Winston | Churchill | Former British Prime Minister. |
| Lady | Colefax | A notable English interior decorator and socialite. |
| Diana | Cooper | An English aristocrat who was a well-known social figure in London. |
| Mr. | Craigre | Elizabeth's fiancé. |
| Lady Alexandra | Curzon | The daughter of George Nathaniel Curzon. |
| Mrs. | Daniels | The housekeeper. |
| Éamon | de Valera | Served as head of government and head of state of Ireland. |
| Sean | Dolan | Thomas' acquaintance. |
| Duke | Elington | An American composer, pianist, and leader of a jazz orchestra. |
| Guy | Fawkes | English member of the Gunpowder Plot. |
| Lady Louisa | FitzGibbon | The daughter of Richard Hobart FitzGibbon. |
| Richard | FitzGibbon | A veteran of the United States Navy. |
| Violet Valerie | French | Oonagh's friend. aka: Valsie. |
| Miss | Gibbs | Uncle Walter's gibbon. |
| Dr. | Gordon | Cloe's physician. |
| Sean | Groom | A freelance writer. |
| Arthur Ernest | Guinness | An engineer and senior member of the Guinness family. |
| Henry | Guinness | Ernest's cousin. |
| Moira | Guinness | One of Henry's daughters. |
| Gertrude | Gunn | Cloe's cousin. aka: Guinne. |
| | Hawkins | One of the nannies. |
| John | Hegarty | An advertising executive. |
| Brian | Howard | An English poet and writer. |
| Katharine | Howard | The daughter of Lord Edmund Howard. |
| Lord | Iveagh | The Guinness' girls grandfather. |
| Teresa | Jungman | One of London's society. aka: Baby. |
| Philip | Kindersley | Oonagh's husband. |
| Robert | Kindersley | Philip's father. |
| Sir Francis | Laking | English physician who was Surgeon-Apothecary to Queen Victoria. |
| Rosa | Lewis | The hotel flamboyant proprietor. |
| Gordon | Macready | British Army general. |
| Michael | Mahon | Thomas' father. |
| Henry Bradley | Martin | Valerie's fiancé. |
| King | Midas | The King with the power to turn whatever he touches to gold. |
| Diana | Mitford | Nancy's sister. |
| Nancy | Mitford | The eldest of the Mitford'd sisters. |
| Brenda Dean | Paul | A British silent film actress, socialite. |
| Mr. | Pearson | The managing director in a publishing company. |
| Denis | Pelly | Assistant in a gramophone shop. |
| Pablo | Picasso | A Spanish painter, sculptor, printmaker, ceramicist. |
| Brinsley | Plunket | Aileen Guinness' husband. aka: Brinny. |
| Arthur | Ponsolby | Elizabeth's father. |
| Elizabeth | Ponsonby | A socialite. |
| Admiral | Redmond | Felicity's father. |
| Mrs. | Spain | The governess. |
| Ray | Starita | British dance band leader and reed player. |
| Lois | Sturt | An English socialite. |
| Stephen | Tennant | A British aristocrat. |
| Madame | Vorolsky | A flirtatious White Russian émigré. |
| Evelyn | Waugh | A writer. |
| Viscount | Weymouth | The 8th Marquess of Bath. |
| | Whitaker | One of the nannies. |
| Mr. | White | The editor in a publishing company. |
| Agatha | | Fliss and Hughie's aunt. |
| Aileen | | One of Ernest and Cloe's daughters. |
| Alex | | Fliss and Hughie's uncle. |
| Arthur | | Zita's husband. |
| Beatrice | | Baby and Zita's mother. |
| Bert | | Baby's friend. |
| Bim | | Stephen's brother. |
| Brigid | | Honour's sister. |
| Bryan | | Walter's son. |
| Burton | | An efficient lady's maid. |
| Captain | | A pony. |
| Cecil | | Mildred's father. |
| Charles II | | King of Scotland, England and Ireland. |
| Chestnut | | Hughie's horse. |
| Cloe | | Ernest's wife. |
| David | | Bryan's acquaintance. |
| Dodo | | Cecil's sister. |
| Dorothea | | Elizabeth's mother. aka: Dolly. |
| Doug | | One of the guests at Elizabeth's party. |
| Driberg | | A reporter. |
| Essex | | Valerie's sister. |
| Evelyn | | Brenda's acquaintance. |
| Evelyn | | Walter's wife. |
| Fantome | | Ernest's ship. |
| Farve | | Nancy's acquaintance. |
| Felicity | | The narrator and the protagonist of the piece. aka: Fliss. |
| Fidget | | A chow puppy. |
| Frederick | | Oonagh's acquaintance. |
| Gay | | Oonagh's son. |
| George | | Susan's fiancé. |
| Grania | | Bryan's sister. |
| Gwyneth | | Lord Tredegar's daughter. |
| Heather | | One of Henry's daughters. aka: Judy. |
| Helen | | A member of Brinny's family. |
| Honour | | One of Rupert's daughter. |
| Hughie | | Fliss' brother. |
| Ida | | Maureen's friend. |
| Jennifer | | Fliss' first female friend. aka: Jen. |
| Joyce | | Brinny's sister. |
| Kathleen | | A housemaid. |
| Katy | | One of Mildred's half-sisters. |
| Lapham | | A butler. |
| Lord Frederick | | Duff's father. |
| Mabel | | One of Mildred's half-sisters. |
| Marjorie | | Maureen's acquaintance. |
| Mary | | A servant. |
| Mary Mercy | | Oonagh's doll. |
| Maureen | | One of Ernest and Cloe's daughters. |
| Mildred | | Ernest's cousin. |
| Moira | | A member of Brinny's family. |
| Molly | | Aileen's acquaintance. |
| Moran | | Hughie's acquaintance. |
| Neelia | | Aileen's daughter. |
| Olive | | Guinness's girls great-aunt. |
| Oojah | | An elephant. |
| Oonagh | | One of Ernest and Cloe's daughters. |
| Pamela | | Stephen's mother. |
| Patricia | | One of Henry's daughters. |
| Peke | | A dog. |
| Peter | | Jen's brother. |
| Queen Charlotte | | Queen consort of Great Britain and Ireland. |
| Rachel | | One of Henry's daughters. |
| Robert | | A junior footman. |
| Rupert | | Ernest's older brother. |
| Snooker | | A black cat. |
| Susan | | Jen's younger sister. |
| Thomas | | A stable hand. |
| Trisha | | Thomas' granddaughter. |
| Walter | | One of Ernest's brothers. |
| Zita | | Baby's sister. |
