Referee appointments for this weekend's games in the Ladbrokes Premiership, Championship, League 1 and League 2.
Ladbrokes Premiership - Friday
Hibernian v Heart of Midlothian - Bobby Madden (Sky Sports, 7.45pm)
Ladbrokes Premiership - Saturday
Dundee v St Johnstone - Craig Thomson
Hamilton Academical - Steven McLean
Kilmarnock v Ross County - John Beaton
Partick Thistle v Aberdeen - Greg Aitken
Ladbrokes Premiership - Sunday
Rangers v Celtic - Willie Collum (Sky Sports, 12 noon)
Ladbrokes Championship - Saturday
Brechin City v Dundee United - Barry Cook
Dumbarton v Queen of the South - Stephen Finnie
Falkirk v Morton - Euan Anderson
Livingston v Inverness CT - Colin Steven
St Mirren v Dunfermline Athletic - Nick Walsh
Ladbrokes League 1 - Saturday
Arbroath v Forfar Athletic - Gavin Duncan
Ayr United v Raith Rovers - Gavin Ross
East Fife v Airdrieonians - Grant Irvine
Queen's Park v Alloa Athletic - John McKendrick
Stranraer v Albion Rovers - David Lowe
Ladbrokes League 2 - Saturday
Annan Athletic v Edinburgh City - Scott Millar
Cowdenbeath v Montrose - Kevin Graham
Elgin City v Berwick Rangers - Lorraine Watson
Stenhousemuir v Clyde - Graham Beaton
Stirling Albion v Peterhead - Mike Roncone
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