The Australian chef had had a 30-year career and was a much-loved food writer with 14 cookbooks under his belt, as well as five TV shows.
He was also a global restaurateur with him and his wife launching a business together that had 19 restaurants across Sydney, London, Greater Tokyo, Osaka, Fukuoka and Seoul.
Granger received honourable recognition in January this year when he was awarded the Medal of the Order of Australia.
Many top chefs shared their condolences and heartache upon hearing the news, with Jamie Oliver commenting on the Instagram statement, confessing the news was “devastating”.
“What a guy he was ... a wonderful human, kind calm soul ... I admired everything he represented in food.
“I remember the first time I met him many moons ago, he couldn’t have been nicer and his food so good.”
Nigella Lawson also commented on the post, sharing her love for his wife and children.
While Maggie Alderson wrote, “Nat and dear dear girls, I’ve been thinking about you so so much, praying it was going to be different news. Sending you all our love and holding your beautiful husband and father forever in our hearts.”