Toni Collette as Jan Vokes

Owen Teale as Brian Vokes

Damian Lewis as Howard Davies

Karl Johnson as Kerby

Siân Phillips as Maureen

Joanna Page as Angela Davies

Alan David as Bert

Lynda Baron as Elsie

Steffan Rhodri as Gerwyn

Anthony O'Donnell as Maldwyn

Di Botcher as Nerys

Darren Evans as Goose

Nicholas Farrell as Philip Hobbs

Peter Davison as Lord Avery

Rhys ap William as Kev / Racing Commentator

Carwyn Glyn as Dylan

Brian Doherty as Gordon

Asheq Akhtar as Peter

Aneirin Hughes as Ron

Benji Wild as Rob Rossi

Rekha John-Cheriyan as Davina

Max Hutchinson as James Lingsford

Alex Jordan as Johnson White

Adam Sopp as Steward

Raj Paul as David Patel

Gerald Royston Horler as Alan the Milk

Rhys Horler as Lee the Twin

Katrina Ward as Glenda

Katherine Jenkins as Herself

Clare Balding as Herself

Robert Ryan as Celebrity Horse Owner

Grant Crookes as Race Horse Owner (uncredited)

Rene Costa as Course Punter (uncredited)

Sarah Trevelyan as Horse Owner (uncredited)