San Francisco's Playboy Mayor Gives Monogamy Another Chance

DANCER IN THE DARK? Siebel, Newsom (inset)

With the announcement of his engagement to actress Jennifer Siebel, San Francisco's philandering Mayor Gavin Newsom is officially off the market. But that doesn't mean the fun has to stop, does it?

Newsom is renowned for picking the live-wire types: upbeat, never dull, and only on occasion in possession any pesky moral hang ups. In other words, chicks like him. While separated from first wife, attorney Kimberly Guilfoyle, now at Fox News in New York, Newsom had an affair with staffer Ruby Rippey-Tourk, the hard-partying sexpot wife of his top aide and close friend Alex Tourk. On the heels of that scandal, which sent Tourk off to rehab and had Newsom swearing off booze (though it's widely rumored he still drinks), he started dating CSI: Miami star Sofia Milos. Afterward, he briefly dated 20-year-old model Brittanie Mountz (yes, that is her real name), and caught guff for squiring her to cocktail parties and events around town.

So it may surprise some to meet flaxen-haired actress Jennifer Siebel, a former downhill ski racer and soccer player once recruited by Stanford (Kappa Kappa Gamma!), who includes pilates among her many dances. (Pilates is a dance? Strange. Anyway.)