Euan Norris is the referee for Saturday's Scottish Premiership game between leaders Celtic and bottom club Hearts, which is live on Sky Sports at 12.15pm.
John McKendrick is in charge as Championship leaders Hamilton Accies travel to Dumbarton while David Somers is the man in the middle for the League 1 encounter between Arbroath and second-placed Dunfermline at Gayfield.
Gavin Duncan is the referee as League 2 frontrunners Clyde entertain Albion Rovers.
Scottish Premiership - Saturday
Celtic v Hearts - Euan Norris (Live on Sky Sports, 12.15pm)
Dundee United v Ross County - Iain Brines
Hibernian v St Johnstone - Alan Muir
Inverness CT v Aberdeen - Steven McLean (Live on BT Sport, 5.30pm)
Kilmarnock v Partick Thistle - Craig Thomson
Motherwell v St Mirren - Willie Collum
Scottish Championship - Saturday
Alloa Athletic v Dundee - Euan Anderson
Dumbarton v Hamilton Accies - John McKendrick
Morton v Falkirk - Stephen Finnie
Queen of the South v Livingston - Barry Cook
Raith Rovers v Cowdenbeath - Greg Aitken
Scottish League 1 - Saturday
Arbroath v Dunfermline Athletic - David Somers
East Fife v Brechin City - Craig Charleston
Forfar Athletic v Ayr United - Don Robertson
Stenhousemuir v Airdrieonians - Mat Northcroft
Scottish League 2 - Saturday
Clyde v Albion Rovers - Gavin Duncan
Elgin City v East Stirlingshire - Andrew Dallas
Peterhead v Stirling Albion - Stevie O'Reilly
Queen's Park v Berwick Rangers - Gavin Ross
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