Derrill Radcliff Osborn, the legendary men’s fashion director for Neiman Marcus, has died in Dallas, according to multiple posts on Facebook late Monday night.

No further details are known at this time, but his death was confirmed by Nelson Bell, a pastor at the Highland Park Presbyterian Church in Dallas. He said Osborn, who had been ill for some time, had planned his own service and a date will be set shortly.

Osborn descended from pioneers and ranchers who settled in Mexico. After serving in the U.S. Army, Osborn started his retail career working at Saks Fifth Avenue in 1964. In the decade he was employed there, he worked his way up from a salesman to a buyer. Osborn briefly ran a men’s clothing and antiques boutique in Beverly Hills before joining Neiman Marcus, where he worked as a buyer for six years before being named vice president of men’s tailored clothing. He retired in 2002.

Osborn, who was known for his flamboyant personal style and ubiquitous mustache, is credited with helping to introduce luxury Italian lines to the store including Ermenegildo Zegna, Brioni and Kiton.

Barry Wishnow of Bash by Barry Wishnow in Nashville wrote: “Losing friends is a tough thing. I lost a great friend named Derrill Osborn. He entered a room, and no matter how you felt, a smile would come to your face. As he was an individual, he adored colorful, interesting people. In his mind, I must’ve fallen into those categories, because we spent more than 45 years knowing each other, for me loving all that he brought to the party. It was a lot.”

Designer Jeffrey Banks weighed in as well, calling Osborn “a style icon, raconteur, fashion executive and, I am proud to say, my friend. Derrill was the true definition of ‘one of a kind.’ He was often referred to as the male version of Anna Piaggi, and he will be sorely missed by the many he knew all over the world.”