Celtic winger Aiden McGeady signed a new five-year contract with the Scottish champions on Thursday.
McGeady, 21, was given the improved deal as reward for a fine season which saw the Republic of Ireland winger voted the Glasgow club's player of the year.
Celtic chief executive Peter Lawwell said: "Our priority has always been to try to keep our best players at the club and the board is delighted to support Gordon (Strachan)'s plans for the future by securing Aiden on this long-term agreement."
"Aiden's performances in recent seasons have made him the outstanding player in Scottish football and clearly we are delighted that he has committed his long-term future to the club.
"It is particularly satisfying that Aiden has become such a success having come through the ranks of our youth development programme.
"While he himself deserves immense praise for all he has done, he is also a real tribute to all those people who have assisted his development including, of course, the great Tommy Burns.
"With Scotland's Player of the Year in Aiden McGeady and the SPL's Top scorer Scott McDonald having now agreed new extended contracts, we are delighted that we have secured the services of two of the finest players in Scotland.
"Clearly, we will also continue to look to make quality additions to our squad and we are pleased to have done this in recent days with the signing of Georgios Samaras, someone who was so crucial to our success last season.
"The Board will continue to do all we can to support the manager and ensure that Celtic stays at the top of Scottish football."