Celtic have been in the market for a new man in the dugout since Neil Lennon stepped down as manager in February.
John Kennedy held the forth from then on until the end of the season, with Celtic finishing the 2020/2021 campaign in second place, 25 points behind champions Rangers. It was the first time in 10 years that Celtic have not been crowned champions of Scotland.
"Celtic is pleased to announce the appointment of Ange Postecoglou as the club's first-team manager with Ange commencing employment with immediate effect,” the Hoops confirmed the 55-year-old’s appointment in a statement to the Stock Exchange.
"The Board of Celtic is pleased to welcome Ange to the club and looks forward to working with him in the future."
Postecoglou was previously in charge of Yokohama F. Marinos in Japan, and has also managed Brisbane Roar, Melbourne Victory and the Australian national team.
On his appointment, Postecoglou said: "The opportunity that has been given to me is one of the greatest honours in football and the responsibility to lead our magnificent football club into the future is one that I will cherish dearly.
"Celtic is one of THE names in world football, of that there is no doubt - a giant of a club, a proper footballing institution and so much more - real history, real substance, real authenticity and real soul.
"I know Celtic is a true way of life for so many people and I know the demands which come with this position - I am ready to do all I can to meet those demands.
"I will be doing everything I can to get our great club back on top and, at the same time, deliver the kind of football which our fans appreciate.
