Toni Collette (Hereditary, Velvet Buzzsaw) and Damian Lewis (Billions, Band of Brothers) will star in the drama Dream Horse, directed by Euros Lyn (Black Mirror, Sherlock Holmes) and written by Neil McKay (Mad Money, Wuthering Heights). Based on a true story, Collette plays Jane, who founded a horse racing organization in her small Welsh village and tried to raise a champion horse. Lewis plays a local accountant who joins the organization.