A Serbian model who has worked for some of the top fashion houses in the world was left unable to walk after she smashed into a tree and suffered multiple pelvic fractures while using a zip-line at a garden party thrown by a billionaire equity manager.

Simona Andrejic, 25, and fellow young models were invited to the soirée at Chinh Chu's home in Westchester, New York, on July 21.

The festivities took a tragic turn when Andrejic was on the zip-line and it failed to brake at the end, causing her to crash into the tree, according to a police report obtained by DailyMail.com.

The model, who has walked the runways of Gucci, Dolce & Gabbana, Dior and Calvin Klein and appeared on the cover of Elle Serbia multiple times, was injured so severely that she is now confined to a wheelchair.

This week reports emerged that Andrejic has filed a multi-million dollar lawsuit against Chu, a 53-year-old former managing director of Blackstone who now runs CC Capital.

'Simona has devastating injuries,' Andrejic's attorney, Salvatore Strazzullo, told Page Six. 'She cannot work and is in substantial pain. She should be fairly compensated within the law.'

Serbian-born model Simona Andrejic, 25, was left unable to walk after she smashed into a tree and suffered multiple pelvic fractures while using a zip-line at a garden party thrown by a billionaire equity manager last month

Chinh Chu, a former managing director at the Blackstone Group who now runs CC Capital, invited a group of young models to his estate in Westchester for a party on July 21

Andrejic claims she will no longer be able to model now that she is confined to a wheelchair. The 25-year-old walked the runways of Gucci, Dolce & Gabbana, Dior and Calvin Klein

The mansion in Westchester where Andrejic endured the tragic accident is seen above. Chu reportedly purchased the property for $5million in 2012

A witness recorded video of the aftermath of the horror crash, which shows emergency responders tending to Andrejic underneath the zip-line.

She was reportedly left clinging to a wooden platform 50 feet in the air in agonizing pain for two hours before medics arrived to rescue her.

Andrejic was transported to a local hospital before being airlifted to Yale New Haven Hospital, where she was treated for multiple pelvic fractures and lacerations in her arm that required stitches.

As Andrejic recovered from the brutal injuries, Chu allegedly promised he would 'take care of things' for her, offering to let her use his Rolls Royce to get to the doctor, paying her medical bills and putting her up in a hotel.

However, sources say he offered a measly settlement of only a few thousand dollars every month for a year, which those who know the financier say is 'pocket change' for him.

When the model declined his offer, one of Chu's aide's allegedly threatened to stop covering her medical and lodging expenses.

Andrejic voluntarily moved out of the hotel but has not been able to return to her walk-up in New York City because she is in a wheelchair.

Chu, a divorced father of two who is now said to be dating a Russian model, his attorney and his publicist have all declined to comment on the lawsuit.

As Andrejic recovered from the brutal injuries, Chu allegedly promised he would 'take care of things' for her by covering her medical bills and putting her up in a hotel. Andrejic is pictured at the 2016 amfAR New York Gala in Manhattan

Andrejic has appeared on the cover of Elle Serbia multiple times (above in 2011 and 2013)

Andrejic is seen on the runway at Oscar de la Renta's pre-fall 2011 show in New York City

Chu was born in Vietnam and fled the country with his family when he was eight years old in 1975.

He went on to become an executive at Blackstone Group, the world's biggest manager of alternative investments, where he worked on some of the companies biggest and most successful leveraged buyouts.

He is worth an estimated $1.1billion, according to The Richest.

In 2007, Chu bought up the final three units of Trump World Tower in New York City from Donald Trump for $33.7million.

He combined the units on the 89th and 90th floors into a 14,864-square-foot duplex with 34 rooms, including 12 bedrooms and 17 bathrooms.

Chu bought the property in affluent Westchester County, where Andrejic's accident took place, for $5million in 2012.

His ex-wife, Ha Phuong, is a prominent Vietnamese actress and singer who rose to fame when her song Hoa Cau Vuon Trau was played during halftime at the 1994 World Cup.

The couple had two daughters together, ages six and eight.