Lily James
as Linda Radlett
Andrew Scott
as Lord Merlin
Dominic West
as Uncle Matthew
Emily Beecham
as Fanny Logan
Dolly Wells
as Aunt Sadie
John Heffernan
as Captain David "Davey" Warbeck
Shazad Latif
as Alfred Wyncham
Annabel Mullion
as Aunt Emily
Assaad Bouab
as Fabrice de Sauveterre
Freddie Fox
as Tony Kroesig
James Frecheville
as Christian Talbot