Ange Postecoglou penned a 12-month rolling contract. The 55-year-old Australian emerged as the shock favourite for the job after talks collapsed with Eddie Howe at the end of May.
Postecoglou will now oversee one of the biggest rebuilds in recent Celtic memory after a season where they finished 25 points behind runaway title winners Rangers.
But if the former Yokohama F Marinos boss is worried about the challenge facing him then he certainly didn't convey that during his opening address to his Parkhead public.He said: "“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.
Read more on dailyrecord.co.uk