Thomasin McKenzie

as Ursula

Sian Clifford

as Sylvie Todd

Jessica Brown Findlay

as Izzie

James McArdle

as Hugh Todd

Jessica Hynes

as Mrs Glover

Sean Delaney

as Teddy Todd

Lesley Manville

as Narrator

Isla Johnston

as Ursula, 10 Years

Maria Laird

as Bridget

Nancy Rumball

as Ursula, Newborn