The company said in a statement that Blackstone would inject 150 million euros of fresh capital into the label and will also buy 60 million euros' worth of shares from the family holding company, Givi.
Versace said the family would remain "at the heart of the company", which was founded by the flamboyant late fashion designer Gianni Versace in the 1970s and is known for its colourful and Baroque designs.
"This investment in the company, together with our clear direction and our outstanding management team, will enable us to achieve Versace's potential," Donatella Versace said in the statement.
Versace also said it would release its 2013 results next month and expected to announce an 18-percent increase in revenues to 480 million euros.