Kim Kardashian has been heating up the bedroom with celebrities long before her sex tape with R& B singer Ray J leaked in 2007.

Adult film star Julian St. Jox revealed he had a ménage a' trois with the reality star at a swingers' party in 2001. In an exclusive story in the upcoming issue of Star magazine, St. Jox said he bedded a, then much younger, Kardashian with another female at the Wyndham hotel in Culver City.

Radar Online posted excerpts from the interview as well as the cover of the upcoming magazine featuring Kim with the headline "Kim, Caught With A Man- And A Woman! Her Group Sex-Partner Tell All!"

"It was around 11:30 p.m. when Kim showed up with a black male," the porn actor told Star. "As soon as Kim walked in, everyone was looking. 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."

Kim, 31, was 20 years old at the time of the reported affair and married to her first husband, music producer Damon Thomas. The veteran porn star of adult films including "The Leather and Lace Gangbang" and "Black and Nasty" was not sure if Thomas was Kim's date that night in September 2001.

St. Jox claimed that his date for the night, porn actress Emily Ann, was attracted to Kim. When she revealed her affections, the two women began dancing together he said.

The 45-year-old actor stated that when the "Keeping Up with The Kardashians" star found the two adult film stars in a private room, she and Ann became intimate and he later joined the two women during their intimate romp.

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

Star magazine stated that a second source confirmed the heated tryst. The scandal with the Kardashian cover story arrives on newsstands on Thursday, Aug. 23.

Kardashian made headlines in 2007 when a sex tape leaked featuring the reality star with her then boyfriend R&B singer Ray J. The home-made video was taped in 2003.

The adult film industry's leading production company, Vivid Entertainment, paid $1 million for exclusive rights for distribution and sales of the video. The reality star later sued the company for the DVD, titled "Kim Kardashian: Superstar," and settled for $5 million.

In October of 2007, she and her family launched the hit reality show "Keeping Up With The Kardashians" on E! Currently in its seventh season, the show has launched several spinoffs including "Kourtney and Kim Take New York" and the family has signed a new three-year deal wit E!, which will keep it on air until 2015.

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Kim Kardashian, Keeping Up With The Kardashians, Kanye West