AceShowbiz -

The Hiltons are no stranger to controversy. This time on, trouble comes to Nicky Hilton. The hotel heiress is being sued by a Chicago development group for breach of contract over a hotel renovation project in her name.

In the lawsuit, filed Monday Feb 12th, Robert Falor Investments and Grand USA Hotel Supply & Restaurant alleged that Nicky hasn't kept up her end of an April 2006 agreement in which she promised to promote the redevelopment project known as Nicky O's Chicago, a Nicky Hilton Hotel.

The project, which included a similar renovation along Miami's swank South Beach, were to serve as Hilton's foray into the family's signature business, although neither Nicky O Hotel would be affiliated with her family's signature Hilton Hotels.

Nicky's agent, Paul Fisher, is also named in the lawsuit. Elliot Mintz, a representative for the beauty, in the mean time says Nicky had yet to see the lawsuit. "Things are not what they appear," Mintz revealed. "When the facts surrounding this matter are known to the public I think you will find the person most impacted by this action will be Nicky Hilton. In the meantime, I don't think anybody should draw any conclusions based on the simple filing of a lawsuit."