The heavyweights will be out in force as the match official appointments for the fourth round of the Scottish Cup have been announced.
Craig Thomson will take charge of the first tie of the weekend as Rangers face another Premiership side in Motherwell at Ibrox on Saturday (KO 12:30 GMT).
And fellow elite official Willie Collum will be in the middle for Celtic’s trip to League One Albion Rovers on Sunday – also live on Sky Sports – with kick-off at 15:00 GMT.
The other TV game will see John Beaton oversee Hearts’ match at Championship outfit Raith Rovers in front of the BBC Scotland cameras earlier on Sunday (KO 13:05 GMT).
Thomson makes Ibrox return
It will be the fourth time Thomson will encounter Rangers this season but his first trip to Ibrox for a year since giving them two penalties in their 4-1 win over Livingston on the way to the Championship title.
Overall, the trained lawyer from Renfrewshire has brandished 95 yellow cards, sent off seven players and awarded six penalties in 24 games in all competitions.
Thomson has previously officiated three Scottish Cup Finals – including Rangers’ 1-0 victory over Falkirk in the 2009 showpiece at Hampden.
He will be assisted by Alan Mulvanny and Andrew McWilliam, with Stephen Finnie on fourth official duties.
Earlier this season, Thomson was involved in a bitter spat with pundit Chris Sutton, who called him a ‘bottler’ after opting not to send off Rangers midfielder Harry Forrester for a second bookable offence in their 2-1 success at Dens Park.
He was also branded ‘the Scottish butcher’ by angry Besiktas players after a controversial performance in their pivotal 6-0 defeat at Dynamo Kiev during the Champions League group stages.
Collum reunited with Celtic
Collum usually officiates Celtic on a monthly basis but it will only be the third occasion he will oversee the champions so far this term.
The 2015 Uefa Super Cup and Euro 2016 referee put in a fine display in their 5-1 thumping of Rangers at Parkhead in September.
But he was criticised by Hoops boss Brendan Rodgers for sending off Calum McGregor in their 1-1 draw at Hamilton on Christmas Eve.
It will be the first time the Religious Education teacher will be in the middle for an Albion Rovers game, which will be staged at Airdrie’s Excelsior Stadium to allow extra fans to watch – a stone’s throw from where he resides in North Lanarkshire.
In 27 matches across six competitions this season, Glasgow-born Collum has dished out 89 bookings, issued five red cards and pointed to the penalty spot nine times.
The 37-year-old has handled two Scottish Cup Finals – the first of which was Celtic’s 3-0 win over Hibernian in 2013.
He will be assisted by Michael Banks and John McCrossan, while Gavin Duncan will act as the fourth official.
To his credit, the notoriously card-happy Collum has rarely attracted controversy this term.
The only notable occasion came when he was slated by fans on social media after harshly penalising Jamie MacDonald for a perceived foul on James Maddison, which led to Aberdeen’s opening goal in their 4-0 win at Kilmarnock in October.
You can see the rest of the Scottish Cup match official appointments here.