While Kim Kardashian's never had a what you might call "wholesome" image, this is still beyond the pale. Today a veteran porn star is claiming to have had a threesome with a then 20-year-old Kim Kardashian at a Los Angeles swingers' party in September of 2001, in an exclusive story from the new issue of Star magazine.

The porn actor, Julian St. Jox, says Kardashian, who is famously-known for her road to stardom, compliments of a sex-tape, joined him in a ménage à trois at the Wyndham hotel in Culver City.

"It was around 11:30 p.m. when Kim showed up with a black male," the porn actor tells Star. (Kardashian, now 31, was married to music producer Damon Thomas at the time, though it is not clear if he was her date that evening to the kinky shindig.)

"They seemed to like what they saw, entered the room, made a drink, and sat in the corner watching other couples have sex. Then they found a spot and had sex together," he claimed, saying Kim was enjoying herself but was submissive."

St. Jox exclusively tells Star he was accompanied to the unique party by another porn star named Emily Ann.

"As soon as Kim walked in, everyone was looking," he said. "She wasn't known at the time at all, not like today, but for everyone who frequented these parties, she was interesting because she was a new face."

St. Jox exclusively tells Star his date to the party took a liking to Kim, propositioned her, and soon the two were dirty dancing with each other.

"She was wearing a tight miniskirt and tank top and designer shoes and bag," he remembered. "From afar she looked gorgeous. She had a great body and seemed bright ... [she had] something special about her: a je ne sais quoi."

St. Jox exclusively tells Star the gorgeous reality star and her date eventually found the two porn stars in a private room, leading to Emily Ann and Kim having sex.

Soon, St. Jox had sex with the future reality star, who he said "looked like she was enjoying herself very much."

"She knew what she was doing. She was very responsive to me", St. Jox recalled.

A second source confirmed the tryst to Star, but with a looming divorce with Kris Humphries, and a new boyfriend in Kanye West, a Kardashian rep has expectedly denied Kim's participation in the orgy.