The family said the London-born designer died early today in Australia, where he lived.
New South Wales Police confirmed that officers were preparing a report for the coroner "after a man was found deceased in a unit in Darlinghurst, Sydney" today morning.
Nicoll was raised in Perth, Australia, and studied at London's Central Saint Martins' College; his 2002 graduate collection was purchased by Dolce & Gabbana
He later worked as creative director of Parisian label Cerutti, designed under his own name and for Marc Jacobs at Louis Vuitton and produced collections for Topshop and Fred Perry.
Nicoll's family said he had been due to start new roles with Adidas and Woolmark.
In a statement, Nicoll's family called him "one of the quiet stars of fashion. He was a true gentleman, a wonderful friend and a much-loved son.
Disclaimer: No Business Standard Journalist was involved in creation of this content