Celebrity hairstylist John Barrett — known for his A-list clients and iconic salon inside Bergdorf Goodman’s N.Y.C. penthouse — has died. He was 66. 

In accordance with WWD, his close friend and health proxy Julianne Jaffe confirmed the explanation for his death was blood cancer. 

On Wednesday, his team shared an Instagram post announcing the news. “On behalf of The John Barrett Salon Team, we regretfully announce, with great pain, the passing of our founder & owner, the legendary John Barrett.”

He was remembered as someone who “lit up any room that he walked into together with his charm, wit, and candor,” the statement continued. “His superhuman talent was his ability to make anyone who sat in his chair feel like probably the most beautiful person on the planet.” 

The post further read: “John — We are going to all the time miss you, love you and we’ll carry on in your honor and memory. Thanks for all you may have done for us and the sweetness industry. Rest in peace our dear friend.” 

Barrett, who grew up in Limerick, Ireland, moved to London in his teens and have become a hairdressing apprentice within the Seventies. Later, he moved to Los Angeles, where he began forming connections with editorial and Hollywood figures. 

By 1996, he opened his first salon in Latest York City contained in the famous Bergdorf Goodman constructing — where his signature “Bergdorf Blonde” hue was birthed — and moved on to open his own salone nearby on 57th Street only a number of years ago. 

“He lived by the phrase, ‘It is not just concerning the hair, it’s concerning the care,’ ” his team shared within the Instagram statement. “He cared with great passion for his beloved family, friends, salon and staff.”

Barrett’s clientele included Sex and the City creator Candace Bushnell, Reese Witherspoon, Katie Holmes and even Princess Diana.

In a Page Six interview published in April, Barrett said his bond with the late princess was “comfortable” and that the 2 were in a position to chat easily. “I get to her suite, and immediately she’s sitting on the bed with my assistant taking a look at photographs of my assistant’s children,” he remembered of their first meeting.

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He’d also worked with Martha Stewart on various looks, whether it was for an impromptu spa day or the Sports Illustrated Swimsuit red carpet that happened this past May. 

“John was friend and a improbable hairdresser,” Stewart shared with WWD. “We are going to miss him sorely.”