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