Kieran Tierney has signed for Arsenal in a record-breaking deal.
The left-back has joined the Gunners in a deal worth £25m plus add-ons.
Celtic wished him well and said the club tried everything it could to keep the player, but he wanted the move.
A statement on the club website said: “We did all we could to keep Kieran at Celtic. While the club did not need or wish to sell Kieran, this was an opportunity which Kieran very much wished to pursue and with the club having received a significant offer, we have agreed to the transfer.
“Kieran has been a big part of the club for a number of years, coming through our Academy structure and becoming a key first team player of real quality.
“He has made a significant contribution to Celtic and we thank him very much for all he has given to the club and, of course, we wish him very well for the future in his career.”
Celtic have, of course, done well out of the deal financially, but it’s money that has to be put to good use or it means nothing.
Neil Lennon is now desperately in need of players, having lost not only quality but a number of battle-hardened winners during the summer.
Lennon wished Tierney all the best as he said: “This is an opportunity Kieran wanted to take and while we will be sad to see him leave the club, we wish Kieran all the very best for the future.
“Although he is still a young guy, Kieran has given the club so much. He’s a great lad and I’ve really enjoyed working with him. I’m sure he will continue to progress and develop and make a big impact in the English Premiership.
“It has obviously been a long process, but now it has been finalised we can now look ahead and concentrate on continuing to build our own squad and meet the many challenges ahead, domestically and in Europe.
“We had a really good performance and result last night at a difficult venue and I would like to thank our fans for travelling to Romania and supporting us so well. Yet again, the team had such great support in Europe and we are hugely grateful for that.
“We look ahead to next week with confidence but of course realise we still have a lot of work to do against a very good team.”
In a cheesy statement, Tierney said: “I’m a Celtic boy born and raised.
“Joined my boyhood club, came up through the ranks and earned my place.
“Now I’ve come to London and I want to make some noise”
Noise at the soulless Emirates would be one of his more remarkable achievements.