Benedict Cumberbatch

as Louis Wain

Claire Foy

as Emily Wain

Andrea Riseborough

as Caroline Wain

Toby Jones

as Sir William Ingram

Sharon Rooney

as Josephine Wain

Aimee Lou Wood

as Claire Wain

Hayley Squires

as Marie Wain

Stacy Martin

as Felicie Wain