And the bags seemed to effortlessly appeal to a variety of women.
Pippa was seen wearing Kate Spade's Bea Stripe Talita Dress during her honeymoon with husband James Matthews in Sydney, Australia back in May 2017.
Spade - a Missouri native who first worked as a journalist, including a stint as accessories editor at Mademoiselle magazine - launched her Kate Spade fashion label in 1993 with her husband Andy and the help of outside investors.
Members of the late designer Kate Spade's family are said to be disgusted by her sister's remarks that her suicide was not unexpected. He also reflected on the time when he first met her in the early 1990s.
The body was found not long after 10 a.m., police said. "She was always creating".
From the original boxy handbags, she expanded into shoes, luggage and other accessories, as well as a home line, stationery, and three books. "Everyone loves to get a letter", Spade told the AP in 2006, explaining that she never used computers and had her staff print out emails.
"We are deeply saddened by the loss of our dear friend and founder, Kate Valentine Spade, who will remain in our hearts forever", the brand tweeted.
Although she had a hugely successful business, Spade's sister Reto Saffo has admitted her suicide didn't come as a shock to her because she's been battling with severe depression for years and refused to seek any medical help for it.
Wilson, of InStyle, recalled often finding her in her store, helping shoppers. "I love this pic of her".
"Knowing Katy, this is how she would want to be remembered", Brosnahan wrote.
"She believed in my vision", he said. "She was so sharp and quick on her feet", the actor said on Instagram.
"Sometimes you simply can not SAVE people from themselves", she also wrote in the email. "She was always smiling, always happy, she had handsome manners, and she always looked attractive".