Bottom club St Mirren defeated leaders Hibernian 2-0 in the Ladbrokes Championship in Paisley on Wednesday night.
January signing Stelios Demetriou got both goals for Jack Ross' side towards the end of the first half and they ran out worthy winners.
St Mirren are now just five points behind Ayr United with a game in hand while Hibs remain seven points clear of Dundee United at the summit.