Celtic defender Kristoffer Ajer has pledged his future to the club by signing a new four-year deal.

The Norwegian youngster has established himself in Brendan Rodgers' starting eleven after impressing upon his return from a loan stint at Kilmarnock last season.

His displays for the Hoops saw the 20-year-old earn his first call-up to the senior Norway national side and make his debut in a friendly win over Australia.

Ajer has now put pen to paper on an improved contract with the Scottish champions that prolongs his stint in Glasgow until at least the summer of 2022.

The ball-playing centre-half was brought to Celtic from Start in July 2016 by compatriot Ronny Deilia.