Tom Rogic's Celtic have become just the third team in Scottish football history - and the first since the 19th Century - to be earn the moniker 'The Invincibles'.
Celtic finished the 2016-17 Scottish Premiership season unbeaten after their 2-0 win over Hearts at home on Sunday, with Rogic coming on at half-time.
Leigh Griffiths and Stuart Armstrong scored the goals for Celtic as they became the first team since Rangers in 1898-99 to finish a Scottish league season without a loss.
Celtic had also achieved the feat in 1897-98.
Rogic played a role in Celtic's opener, releasing Patrick Roberts down the right who crossed for Griffiths to head home in the 50th minute.
Griffiths then instigated Armstrong's 76th-minute strike, with his cross causing problems in Hearts' penalty area before the midfielder pounced to fire the ball past goalkeeper Victor Noring.
Brendan Rodgers' Celtic finished the season with 106 points, 30 clear of second-placed Aberdeen, while Rangers (67) finished third.
Rogic scored seven goals and notched five assists in 22 league appearances for the champions.
The Socceroos playmaker has won back-to-back Premiership trophies with Celtic, while he can lift his fifth trophy with the Glasgow-based giants if they overcome Aberdeen in the Scottish Cup final on Saturday.
Celtic will be aiming for a domestic treble at Hampden Park.