Olivia Colman

as Deborah Flowers

Julian Barratt

as Maurice Flowers

Daniel Rigby

as Donald Flowers

Sophia Di Martino

as Amy Flowers

Will Sharpe

as Shun

Leila Hoffman

as Hattie Flowers

Georgina Campbell

as Abigail

Angus Wright

as George

Colin Hurley

as Barry

Harriet Walter

as Hylda