Alistair Johnston has signed a new long-term contract at Celtic.
The defender, 26, will remain at the Parkhead club until at least 2029.
Johnston had been under contract for another three years but Celtic chiefs moved quickly to further extend terms with the Canadian internationalist.
The full-back joined Celtic from CF Montreal in December 2022 and has been a key figure under both Ange Postecoglou and Brendan Rodgers.
Commenting on his new deal, Johnston said: “I am just delighted to extend my contract with Celtic. I got a brilliant welcome to the club in 2022 and ever since I have had the best of times, loving every minute as part of such a great institution and I wanted to continue to be part of that.
“It’s an absolute honour to pull that famous jersey on every week and to have achieved so much success with my team-mates already has been so satisfying. But of course, we want more and that is our focus.
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“It is a real delight to be working day in, day out in such a great set-up, working with the gaffer and the staff who have such ambition for success and with such a great group of lads in the team.
“Of course my team-mates have been everything to me - it is a brilliant dressing room I am privileged to be part of, with real quality guys beside me and I know we are all, collectively looking to work as hard as we can to bring our fans even more success over the next few years.”
Celtic manager Rodgers added: “It is fantastic news for the club and our fans that Ali has agreed this new contract.
“In a relatively short period of time he has established himself as a fantastic player for Celtic, showing real quality and just delivering performance after performance for us, week in, week out.
“He has a phenomenal work ethic and attitude, brilliant hunger and positivity, such an honest love for the game and a real desire to improve in everything he does.
“These are the qualities which make a great player and he has certainly been that for Celtic.
“Everyone at the club felt it crucial that we extend Ali’s contract with Celtic and I am delighted that we have been able to do this.”