The iconic figure, known for her extensive facial surgeries that gave her feline features, passed away in her sleep on New Year's Eve at the age of 84.

According to her longtime partner, Lloyd Klein, Wildenstein was getting ready for the ring in 2025 and appeared to be in "perfect" health just days before.

Just a day after Wildenstein's sudden death, Klein provided insight into how his lover's final hours played out.

"We had a nice happy hour that same night," said the famous fashion designer, "and we were getting ready for the new year, and we took a little nap just to look good before we got dressed."

Klein says he woke up first, then tried to wake Wildenstein to no avail.

"I said, 'Jocelyn, we have to wake up, we have to get dressed,'" he recalls, "and she was cold and dead."

Making matters even more heartbreaking, according to Klein, was that Wildenstein had been in "perfect" health just days earlier.

“We were at the Ritz two days ago. We had dinner," he explained.

"Before that we used to come to Fashion Week at Chanel. Everything was good, everything was good."

According to Klein, Wildenstein suffered from a condition known as phlebitis, which causes inflammation of the veins due to damage within the vein walls or blood clots that block flow.

Wildenstein's grandmother was also said to have suffered from the condition.

Klein claimed his partner's legs were badly affected by the diagnosis, causing them to swell and create a blockage via a pulmonary embolism.

"Because of her phlebitis, (her) legs were very, very swollen," he said PEOPLE"and the blood was blocked, and there was no oxygen to the brain."

Klein, who was first linked with Wildenstein in 2003, is understandably devastated by the loss.

"It's extremely sad to lie with my other half, who (I've known) for 21 years, waiting to celebrate the New Year, and (instead) find her cold," he said.

The media personality, who has been dubbed "Catwoman" and "Wildenstein's bride" in the press, came to public attention in 1999 after her divorce from art dealer Art Wildenstein.

In a presentation from 1998 Vanity FairArt, who eloped with Jocelyn at a Vegas wedding in 1978, claimed he tried to make her see sense and accept her natural appearance.

“She thought she could fix her face like a piece of furniture. Skin doesn't work that way," he said, "but she wouldn't listen."

During their marriage, Wildenstein underwent multiple facelifts and facial reconstruction surgeries, leading to her infamous feline figure, consisting of arched eyes and slightly exaggerated cheekbones.

Art, who also went under the knife several times, eventually left his wife for a 21-year-old Russian woman named Yelena Jarikova. After an angry Jocelyn allegedly discovered the two in bed together, she arrested Art.

Because of this, the once cordial divorce proceedings would turn ugly.

"It seems that my husband no longer has any use for me," Jocelyn allegedly stated in court documents, "instead preferring to squander our wealth on his girlfriend."

The contentious divorce proceedings would last two years, culminating in Ms. Wildenstein walking away from a $2.5 billion settlement.

Two years after that she would meet Lloyd.

"Jocelyn is a wonderful lady," he told the media in 2016, adding: "She is extremely refined and a woman of great taste."

Although the public saw her as a rich diva, Klein would reveal in 2023 that his partner used her wealth to help others by creating water sources in Africa and opening several animal care clinics on the continent.

“She's known for plastic surgery,” he noted, “but I don't know if that's what she should be known for because she's done a lot of amazing things in her life. Big, big, big achievements."

Although she never shied away from going under the knife, Wildenstein, who likened her face to that of a lynx rather than a common cat, argued that her memorable features were improvements on those she already possessed.

"If I show you pictures of my grandmother, what you will (see) are these eyes - cat eyes - and high cheekbones," she once said.

Wildenstein is survived by Klein and her two children, Diane and Alec Jr., from her former marriage.