St Mirren will be presented with the Ladbrokes Championship trophy after Saturday's home game against local rivals Morton.
Jack Ross's team sealed their return to the top flight with a 0-0 draw against closest challengers Livingston at the weekend and conclude their campaign at Falkirk on April 28.
This is the fifth time the Buddies have won the second-tier title in Scottish football and ends a three-season stay in the Championship.
Champions and managers
1967/68 - Alex Wright
1976/77 - Alex Ferguson
1999/00 - Tom Hendrie
2005/06 - Gus MacPherson
2017/18 - Jack Ross
