Rose to fame as London Tipton in The Suite Life of Zack & Cody, which she also co-produced. She received additional fame for reprising her role on the series The Suite Life on Deck.
After being scouted in a shopping mall at age five, she began acting in commercials. She made her debut film appearance in the 1996 movie Santa with Muscles.
She starred in the movie The Social Network, and won the 2001 Young Artist Award for Best Performance in a TV Movie for The Ultimate Christmas Present.
She has two younger brothers named Timmy and Nathan. She was once engaged to Trace Cyrus, but the couple ended their relationship before they wed. In 2017, she began dating former child star Macaulay Culkin.
She became friends with Ashley Tisdale, who she met on the set of Bette.