Cedric Brown - Father - Colin Firth
Mrs. Brown - Mother (deceased)
Lucy Brown - 15 - Sabrina Carpenter
Simon Brown - 13 - Thomas Sangster
Tora Brown - 12 - Eliza Bennet
Lily Brown - 10 - Jennifer Rae Daykin
Eric Brown - 9 - Raphael Coleman
Sebastian Brown - 6 - Samuel Honywood
Christianna Brown - 6 - Holly Gibbs
Agatha Brown - 1 - Hebe Barnes
Jacob White - 15 - Will Poulter
Rest of cast as themselves.