Spencer claims that Kim -- who is the stepsister to The Hills' star Brody Jenner -- used to try to sneak her way on-screen by organizing Heidi's closet as the show was being filmed.
"[Kim] used to call Heidi to organize Heidi's closet," Spencer told the magazine. "Kim was edited out of Hills episodes organizing Heidi's closet. Now it's like, 'Kim Kardashian breaks the internet with her booty.' Like, what the f**k? That's real life for us."
Kim's rep, however, says the 34-year-old reality star was never going to be on The Hills. ET also caught up with former Hills star Kristin Cavallari at her Chinese Laundry fall fashion campaign on Wednesday, who also claims she had never heard those rumors.
Spencer also added that Kardashian matriarch Kris Jenner once asked him to manage Kim, who was relatively unknown at the time. He claims he could even see the momager's eyes "light up" at the thought of fame and fortune.
"She can deny it if she wants, but she comes up to me and is like, 'Spencer, I want you to manage Kim.' I literally started laughing," Spencer said. "What is this lady talking about?"
Though she may be one of the most well-known reality stars today, this isn't the first time we've heard of Kim fighting for fame before the rise of the Kardashian empire. Back in 2003, Kim appeared on The Simple Life as a closet organizer and personal assistant to her friend and star of the show, Paris Hilton.
"We've known each other since we were little girls. We've always been friends," Paris told Yahoo Style in April when asked about Kim. "It's nice to inspire people, so yeah, I'm really proud of her and what she's done though." Watch the video below to hear more.