Did Rachel Uchitel Really Hook Up With Jeremy London?

Celebrity Rehab costars shoot down reports that they had fling while shooting reality show

Jeremy London is not taking Tiger Woods' sloppy seconds, thank you very much. And vice versa.

Both the erstwhile 7th Heaven star and Rachel Uchitel, the party girl best known as the pro-golfer's mistress, are slamming a report they hooked up while shooting the fourth season of VH1's Celebrity Rehab With Dr. Drew.

"No I am not having an affair with Jeremy London," Uchitel exclusively tells E! News. "People need to stop associating me with sex and men, and married men. I am not in a relationship and have not been for a quite a while and Jeremy and I are friends. Never have been more."

London echoed as much.

"Jeremy is truly saddened by the false allegations made by Melissa regarding his newfound friendship with Rachel Uchitel," his publicist says. "The fabricated statements are nothing more than her ongoing need for public attention. Throughout their divorce proceedings, Melissa authored similar works of fiction for the tabloids and later acknowledged that the allegations were false."

Uchitel, 35, and London, 37, were forced to make their denials after his estranged wife, Melissa, allegedly told about the supposed fling.

"Melissa is ridiculous...she has no idea what she's talking about and she's behaving like a child," London told Radar separately.

Hookup or not, sure sounds like somebody's marriage could use rehab.

—Reporting by Jason Kennedy