Mariska Hargitay: Hamptons Magazine Cover Girl!

Mariska Hargitay celebrates her Hamptons Magazine cover during a Memorial Day party hosted by mag publisher Jason Binn and his wife Haley on Sunday (May 30) in Southampton, New York.

The 46-year-old Law & Order: SVU star wore Michael Kors and was accompanied by her husband, director Peter Hermann (their adorable son August napped this one out).

Also in attendance and pictured below: Desperate Housewives actor Kyle MacLachan (with his wife, PR guru Desiree Gruber), Elle‘s creative director Joe Zee and Just Jared.

Later in the evening, Georgica Restaurant & Lounge opened for their sophomore summer in Wainscott, NY, hosting a bevy of celebrities including hip-hop mogul Russell Simmons and model Jessica White (both pictured below).

10+ pictures inside of Hamptons mag cover girl Mariska Hargitay…