Morton started singing when she was 18 months old. When she was 12, she played Annie in Annie at her school in Baton Rouge, Louisiana. She was 7 when she landed the part of young Cosette in Broadway'sLes Misérables in 1996. Costar Ricky Martin would rub makeup on her hands for good luck. In 1998, Alicia beat 3,000 girls to win the part of the Disney TV movie Annie, which was broadcast on 7 November 1999 following a private screening at the New Amsterdam Theatre on 1 November 1999. In this role, Morton struggled with some of the dramatic moments. "The emotional scenes were hard for me," she says, until an acting coach suggested she draw on her father's death. Her best friend, Alexis Kalehoff, is the daughter of Broadway's original Annie, Andrea McArdle. McArdle also had a cameo role in Morton's film version of Annie; she played the Star-to-Be who has a solo in the song NYC. Her most recent film was the 2006 vampirehorror filmThe Thirst, where she played a young girl with hemophilia named Sara.
She graduated from East Ascension High in 2005, and started her freshman year of college in 2006. She also plays guitar. She studied music at Tulane University and also occasionally performs in regional theatre.
From October 6–16, 2011, Morton starred alongside Andrea McArdle in the new musical Greenwood the New York Musical Theatre Festival. Morton now resides in her hometown of Gonzales, Louisiana, where she's teaching drama at Ascension Christian High and is engaged. Today, Alicia enjoys working with young performers. She spends her time working with the theater department at Ascension Christian High School in her home town of Gonzales, Louisiana.