The story frames on 7-year-old Maisie, caught in a custody battle between her mother – a rock and roll icon – and her father. What Maisie Knew is an evocative portrayal of the chaos of adult life seen entirely from … Julianne Moore, Steve Coogan, Alexander Skarsgård, Joanna Vanderham, Onata Aprile, Diana García, Sadie Rae Added on Peacock 2021-07-17. Youtube Trailer