Her big break came when she got the role on the sitcom What I Like About You in September 2003. She co-starred alongside Amanda Bynes and Jennie Garth. She starred on the show for three-seasons until it ended on April 24, 2006. Her career took a jump with recurring role of Fez’s stalker girlfriend Caroline on That 70’s Show. She married her childhood friend actor Scott Holroyd on November 17, 2007. The wedding ceremony took place at the French Huguenot Church in Charleston, South Carolina. They currently live in Los Angles with Buster Keaton their pet terrier, Allison gave birth to a baby boy they named Nathan Powell Holroyd in November 2011. Holroyd played the role of David Fletcher the new love interest of Allison’s character Lauren on the WB’s final season of One Tree Hill.