Biography: Rocco Day is a child actor originally from Nottingham, UK. Rocco is known for his roles as Grumpy in Lars Von Trier's 'The House That Jack Built' (2018), the Young Warlock in Amazon/BBC Studio's 'Good Omens' and as Jacob in Channel 4's 'Traitors'. Rocco was also a lead cast member in 'Refugee' (2016) which went on to win a Children's BAFTA in 2016 for 'Best Drama'.