"I would never put my own personal marriage (plans) on television," Richie tells PEOPLE in its upcoming issue.
While FOX has said the fourth season of the reality show could center on Paris Hilton's and Richie's wedding preparations, Richie says she won't agree to go along with it.
"The great thing about The Simple Life is that it's a reality show but not based on my reality. It has nothing to do with my life or my home or my relationships or anything. I'm not open to anything like that."
Although Richie and former pal Hilton have creative input on the show, Richie says she hasn't heard from FOX executives yet.
This month a FOX rep told PEOPLE: "The concept is still under discussion."