Jessica Alexander (born 19 June 1999) is an English actress and model best known for her role as Lucy Carpenter in the Disney Channel show Penny on M.A.R.S. and Olivia Hayes in the Netflix teen thriller series Get Even. She began acting in short films but made her first television debut as Lucy in Penny on M.A.R.S.

In 2023, she played Vanessa in Disney’s live-action film adaptation of The Little Mermaid.