Isabella Acres provides the voice of Katie, one of the Fireside Girls, in Phineas and Ferb. She has also guest starred on "The Mentalist," "Hannah Montana," "Desperate Housewives," "The Middle," and "The Event."

She provided voice-over and ADR work on tv shows such as "Scooby Doo! Mystery Incorporated," and "Adventure Time," and movies such as "Air Buddies," "30 Days of Night," "Horton Hears a Who!," "The Women," "Four Christmases," "Cloudy With a Chance of Meatballs," "A Nightmare on Elm Street," "The Back-Up Plan," "Hereafter," "How Do You Know," "Yogi Bear," "Little Fockers," "The Last Airbender," and "Free Willy: Escape from Pirate's Cove."

Isabella starred in the 2011 television movie, "Beyond the Blackboard" and will starring in the upcoming film, "The Future." She has also starred in commercials for Wal Mart, El Pollo Loco, Mrs. Butterworth, Children's Claritin medicine, McDonald's Littlest Pet Shop Happy Meal, and Keebler Cookies.