King made her film debut in Reign Over Me as Adam Sandler's character's daughter. She then voiced the yellow fur ball Katie in the animated feature Horton Hears a Who! (2008), and Beaver in Ice Age: Dawn of the Dinosaurs (2009). She also appeared in Quarantine (2008). In 2010, she guest-starred in the series Ghost Whisperer. She was also featured in The Suite Life of Zack & Cody as Emily Mason in two episodes. Other television appearances include Entourage, CSI: Crime Scene Investigation, and Medium.