By Thom Geier
Updated June 20, 2010 at 06:41 PM EDT

Constance Zimmer, who plays feisty studio exec Dana Gordon on HBO’s Entourage, announced her engagement to commercial director Russ Lamoureux, reports. The couple, who have been together for three years, plan to wed this fall. They welcomed a daughter, Collette Zoe, in January 2008.