Mulgrew re-signed for Celtic in July 2010 after coming through the ranks at the club as a youngster, and has grasped his second-chance as a Bhoy with both hands.
He never made a first-team appearance before leaving the Hoops in 2006 and joined Wolves before moving on to Aberdeen.
However, since his return, Mulgrew has been apivotal member of the Celtic first team, earning his first call-up to the full national side in 2012. He has continued to be a vital player for his country since Gordon Strachan took charge. Meanwhile, his club form was recognised in 2012 when he was awarded Scotland's Player of the Year.
Mulgrew's versatility has seen him comfortably perform in defence and midfield during his time at Celtic, while also donning the captain's armband in Scott Brown's absence.
One of Celtic's most consistent performers, Mulgrew was an important player for the team as the Hoops made it three-in-a-row.
This season, Mulgrew continued his strong partnership in midfield with Scott Brown before a spell on the sidelines through injury at the turn of the year.
Having featured for the Development Squad in May of 2015, he returned to the first XI as a second half substitute in the penultimate games of the season against St Johnstone.
Mulgrew would feature against Dukla Prague, Real Sociedad and SD Eibar in the Celts pre-season friendly ties. His performances prompted Ronny Deila to hand him a starting berth at home to FC Stjarnan in Celtic's opening UEFA Champions League qualifying tie at Celtic Park.
Taking a two goal lead into the away tie, Mulgrew found the net to score the second goal of a 4-1 away win.