She starred as cheerleader Claire Bennet on NBC's Heroes from 2006 to 2010 after gaining fame on One Life to Live as Sarah Roberts. In 2012, she began starring in Nashville.
She made her acting debut when she was 11 months old in a commercial for Playskool.
She played Kirby Reed in the thriller Scream 4, and played Lizzie Spaulding on Guiding Light from 1996 until 2000.
In 2013, she got engaged to heavyweight boxing world-champion Wladimir Klitschko and she and Klitschko had a daughter named Kaya Evdokia on December 9, 2014. She also previously dated NFL receiver Scotty McKnight and her Heroes co-star Milo Ventimiglia.
She played young Sheryl Yoast in Remember the Titans, which was produced by Jerry Bruckheimer in 2000.