New Dundee United manager Ray McKinnon watched from the Rugby Park stand as the Tangerines beat Kilmarnock in their final match of the season.
Dundee snatched defeat from the jaws of victory at Rugby Park as they lost 3-2 to 10-man Kilmarnock.
St Johnstone crashed out of the Betfred Cup after a 3-0 hammering at home from Partick Thistle.
A Fraser Fyvie masterclass helped Dundee United stamp their authority back on the Championship with a remarkable win over Dunfermline.
Dundee United 1 St Mirren 0: Title party cancelled as Billy King secures vital victory for Tangerines
Dundee United stopped St Mirren celebrating clinching the Championship title at Tannadice thanks to a display full of fight.
Dundee United caretaker coach Laurie Ellis brought the curtain down on his successful spell in charge with a crucial win over St Mirren.
Scott McDonald hammered home a late winner to give the Tangerines a very welcome win at Tannadice.
Dundee United manager Csaba Laszlo congratulated Scott McDonald on making all the difference at Glebe Park last night.
Scott McDonald served notice that Dundee United are back in the “winning groove” ahead of their massive match against Dunfermline.
St Mirren 2 Dundee United 0: Tangerines pay penalty as they slip five points behind Championship leaders
Dundee United will go into 2018 five points adrift of Championship leaders St Mirren following this dismal defeat in Paisley.