The Wham! singer “died peacefully” at his home, his agent said.
Michael — whose real name is Georgios Kyriacos Panayiotou — sold more than 100 million albums throughout a career spanning almost four decades.
In a statement, the star’s publicist said: “It is with great sadness that we can confirm our beloved son, brother and friend George passed away peacefully at home over the Christmas period.
“The family would ask that their privacy be respected at this difficult and emotional time. There will be no further comment at this stage.”