Constance Zimmer: Engaged to Russ Lamoureux!

Ari Gold, step off.

Constance Zimmer, who plays feisty studio executive Dana Gordon, the target of Gold's "affections" on HBO's Entourage, is getting married this fall.

The actress is set to wed boyfriend of three years, director Russ Lamoureux, her rep tells People. They welcomed a daughter, Colette Zoe in, 2008.

Congratulations to the happy couple, and our condolences to Ari. Tough one. Follow this link to read some of her memorable Entourage quotes!

Constance Zimmer is off the market.