Morton started singing when she was 18 months old. When she was 11, she portrayed the title character in Disney's television film Annie. When she was 12, she once again played the title character in Annie at her school in Baton Rouge, Louisiana. She was 7 when she landed the part of young Cosette in Broadway's Les Misérables in 1996. Costar Ricky Martin would rub makeup on her hands for good luck.