Maberly made her screen debut in the 1993 film The Secret Garden, as Mary. Her other film appearances include Finding Neverland (as "Wendy" in the play scenes) and Like Minds (with Thomas Sturridge). TV movie credits include The Langoliers (with Bronson Pinchot), The Last of the Blonde Bombshells (with Ian Holm and Billie Whitelaw), and Victoria & Albert.