TV actress notable for her roles on the series Nip/Tuck, One Tree Hill and later Chicago P.D. Her film credits include John Tucker Must Die, The Hitcher and The Narrows.
She was named the Tournament of Roses Parade Queen at age 17.
An avid activist, she became a spokeswoman for Dosomething.org.
She married Chad Michael Murray in April of 2005 and the couple separated in September of 2005. She later dated former Google executive Dan Fredinburg. In 2015 she began dating Jesse Lee Soffer.
She had a role in National Lampoon's Van Wilder opposite Ryan Reynolds.