Main •
Rose Williams as Charlotte Heywood •
Kate Ashfield as Mary Parker •
Crystal Clarke as Georgiana Lambe •
Turlough Convery as Arthur Parker •
Jack Fox as Sir Edward Denham •
Kris Marshall as Tom Parker •
Anne Reid as Lady Denham •
Lily Sacofsky as Clara Brereton (Series 1-2) •
Charlotte Spencer as Esther, Lady Babington née Denham (Series 1-2)
Series 1 •
Theo James as Sidney Parker •
Alexandra Roach as Diana Parker •
Matthew Needham as Mr. Crowe •
Mark Stanley as Lord Babington •
Leo Suter as James Stringer
Series 2 •
Maxim Ays as Captain William Carter •
Frank Blake as Captain Declan Fraser • Rosie Graham as Alison Heywood •
Ben Lloyd-Hughes as Alexander Colbourne •
Alexander Vlahos as Charles Lockhart •
Tom Weston-Jones as Colonel Francis Lennox
Series 3 •
Sophie Winkleman as Lady Susan de Clermonte •
Liam Garrigan as Samuel Colbourne •
Emma Fielding as Lady Montrose • Edward Davis as Henry "Harry" Montrose, the Duke of Buckinghamshire •
Alice Orr-Ewing as Lady Lydia Montrose • Cai Brigden as Ralph Starling •
James Bolam as Rowleigh Pryce
Recurring cast •
Kevin Eldon as Mr. Hankins •
Adrian Scarborough as Dr. Fuchs •
James Atherton as Fred Robinson •
Sophie Winkleman as Susan, Lady Worcester, later Lady de Clemont • Jack Brady as Mr. Howard • Isobel Hawkridge, Molly Bishop, Isaac Vincent-Norgate as the Parker children: Alicia, Jenny and Henry
Series 1 •
Elizabeth Berrington as Mrs. Griffiths • Mollie Holder as Phillida Beaufort •
Rob Jarvis as Isaac Stringer • Jyuddah Jaymes as Otis Molyneux •
Ruth Kearney as Eliza Campion • Kayleigh-Paige Rees as Julia Beaufort
Series 2 •
Sandy McDade as Miss Beatrice Hankins • Flora Mitchell as Leonora “Leo” Colbourne • Eloise Webb as Augusta Markham •
Flo Wilson as Mrs. Wheatley
Guest cast • Sarah Belcher as Mrs. Heywood • Clinton Blake as Sam Sidaway •
Liz May Brice as Mrs. Harries •
Jon Foster as Beecroft •
Adrian Rawlins as Mr. Heywood • Tessa Stephens as Young Alison Heywood ==Episodes==