In 2003 Gertz starred as Brandy, a wanted criminal's girlfriend, in "Undercover Christmas", and in 2005 Gertz played the lead role in the TV film "". In 2009–10 she had a recurring role as Marlo Klein, wife of Ari Gold's newest business partner Andrew Klein, an agent at Miller-Gold Talent Agency, on HBO's "Entourage". In 2011, she returned to broadcast television with a guest role in the "Modern Family" episode "Slow Down Your Neighbors". In 2011, she earned a producers' credit on the Academy Award-nominated film "A Better Life", which was put in limited release throughout the month of June and early July before arriving on DVD in October.