Authorities said housekeeping staff found the designer hanging in her Park Avenue apartment at about 10:20 a.m., according to The Hollywood Reporter.
The heartbroken sister of USA fashion designer Kate Spade has opened up on the 55-year-old's battle with mental illness and the harrowing conversation they had before her death.
Officials are not authorised to divulge any additional information as the investigation into her death continues.
Spade, 55, rose to prominence in fashion starting with her line of handbags in the 1990s, starting a company along with husband Andy Spade.
Her brand, Kate Spade New York, has more than 140 retail shops and outlet stores across the U.S. and more than 175 shops internationally. In 2007, Spade sold the remaining portion to Neiman Marcus Group in order to spend time with her daughter, Frances.
Just past year, Coach bought Kate Spade's company in a whopping $2.4 billion deal.
The New York Police Department confirmed the designer's death under her birth name, Katherine Noel Brosnahan. Her husband and business partner Andy Spade was in the house at the time. In the meantime, we send out condolences to her family.
Spade, who was an accessories editor at Mademoiselle magazine, launched her company with husband Andy in their apartment in 1993.
He also deleted his original tweet and explained it by telling Page Six, "I often say, 'We may not heel the world, but we hope to be an accessory.' After posting the tweet, I realized there may have been room for misinterpretation".
Our thoughts remain with her friends and family during this hard time. She most recently launched a new accessories label, Frances Valentine.
"My grandmother gave me my first Kate Spade bag when I was in college".
"Fuzzy picture but i love it. Kate and I during Christmas family photos", David captioned the photo. "She was also a staple of NYC who spread goodwill".