Kristin Davis and her Sex and the City character, Charlotte, may have both been unlucky in love at one time or another, but it seems Davis has now found a match in celebrity photographer Russell James.

"It's been going on for a bit now," says a source close to the actress. "She's very supportive of him – she seems very happy."

On July 20, the pair joined another pal at Katsuya Brentwood for dinner in Los Angeles. James and Davis, 44, sat in an intimate booth, sharing one very small side of a bench, and were affectionate throughout dinner, says a witness. Davis rested her head against his shoulder.

"She was all smiles," says the onlooker. "A little giddy." The duo walked out quietly, trying to keep a low profile, with Davis grabbing James's hand for a second as they headed up the steps.

In June, Davis joined James at a party to celebrate his new photography book at the grand reopening of Santa Monica's Shangri-La hotel. "They hung out at the party and were definitely a little flirty even in public. They seemed like an item," said an observer at the time.