Rosie was born in Epsom, England along with her twin sister Davina. She has been acting since she was eight years old. Rosie's first major screen role was playing Petunia Larkin in ITV's 2021 series "The Larkins", adapted from the novel "The Darling Buds Of May" by H.E. Bates. The role of Alice in Apple TV's 2024 Constellation, marks her first international role.