St Mirren pulled off a stunning 3-1 victory over Celtic FC in the Scottish League Cup on December 14, 2025, to claim a historic trophy at Hampden Park. This monumental upset saw the Buddies lift the cup after a magnificent performance against the heavily favored Premiership champions. St Mirren took a shock early lead and doubled their advantage before halftime, sending their supporters into dreamland. Celtic pulled a goal back in the second half to set up a tense finale, but St Mirren sealed the win with a late third goal on the counter-attack. The victory is one of the greatest in St Mirren's history, delivering a major trophy against all odds. Celtic's quest for a domestic treble was ended in dramatic fashion, with the St Mirren players and staff celebrating a perfectly executed tactical masterclass.