Nicky Hilton is suing her former clothing line partners for $5million.

The sister of 31-year-old socialite Paris Hilton, is claiming Asher Group is responsible for the failure of a high-end fashion venture she undertook, according to TMZ.

Nicky signed a deal with Eliyahu Cohen and the Asher Group to launch Nicky Hilton Worldwide in 2006 and market top style products under her name.

She claims they promised to provide $4.9 million in financing for the operation and pay her a guaranteed annual salary of $250,000 plus a 10 per cent increase each year.

But in a lawsuit filed in LA County Superior Court, Nicky asserts that the Asher Group failed to secure the $4.9 million.

The 28-year-old designer also insists they never paid her salary and wasted the money the company did have on unnecessary personal expenses.

Nicky states that Asher Group spent $9000 per month on a personal assistant who ''spent most of her time running personal errands for Asher and other tasks unrelated to NHW business.''

She claims Asher and Cohen's irresponsible conduct caused her company to not do well, leaving Nicky to ''clean up the mess.''

Now, she's demanding at least $5 million in damages.