Maria Darling is a British voice actress who has provided many character voices for children's television Maria Darling is a British voice actress who has provided many character voices for children's television programs in the United Kingdom and the United States. She is known for voicing Dizzy and Roley in the US version of Bob the Builder. in the United Kingdom and the United States. She is known for voicing Dizzy and Roley in the US version of Bob the Builder.