Paris Hilton’s ex, Doug Reinhardt dating Kristin Cavallari?

[HMG] – Having already dated Paris Hilton, Lauren Conrad and Stephanie Pratt — young sister of Spencer — Doug Reinhardt now has a new girlfriend in play — Kristin Cavallari.

The 24-year old baseball player was spied at the Voyeur nightclub on Santa Monica Boulevard in West Hollywood late Saturday night — and Kristin was right at his side.

“They were so cute, holding hands and smooching,” a party-goer told Radar. “At one point they were actually making out.”

The pair were first spotted together at the Coachella Music Festival in April, just after Doug broke up with Paris. But those close to the pair say this time the link is more serious.

With ‘The Hills’ now mercifully over, Kristin is denying the rumors – but clearly loving the press.

“I’ve known Doug since I was 15 years old,” she told  the scribes. “Yeah, I saw him there, but not like that.”

And she’s right — Doug, Kristin and Lauren were classmates at Laguna Beach High School. But Kristin dated Stephen Colletti, not Doug. Doug took Lauren to his senior prom, and she then dated Stephen – And that started a feud between the two girls.

Lauren’s next love was her fellow inmate from ‘The Hills,’ Brody Jenner…who then dated Kristin…and Jayde Nicole.

Does anyone else see a pattern here??

We’ll keep you informed if Doug’s new romance has any chance of a future…