Hayley Atwell

as Margaret Schlegel

Tracey Ullman

as Aunt Juley Mund

Matthew Macfadyen

as Henry Wilcox

Philippa Coulthard

as Helen Schlegel

Alex Lawther

as Tibby Schlegel

Julia Ormond

as Ruth Wilcox

Joseph Quinn

as Leonard Bast

Rosalind Eleazar

as Jacky Bast

Joe Bannister

as Charles Wilcox

Bessie Carter

as Evie Wilcox