The appointment confirms the remarkable rise through the ranks for the Lanarkshire based official whose father Hugh was sacked by the SFA after sending hate-filled emails about the Pope and the Catholic Church.
This season he has only been in charge of seven Premiership matches with his only Celtic appointment coming in September for the 0-0 draw away to St Mirren.
Last month he was involved in controversy in the Hamilton v ‘Rangers’ match when he awarded two late penalties to the tribute act when the game was tied at 1-1.
His last Premiership appointment was in the October 31 Edinburgh derby when he issued seven yellow and one red card.
One of his assistants at Hampden will be Frank Connor who was the North Stand side linesman that missed Josh Meekings’ hand ball from a Leigh Griffiths header in the Celtic v Inverness Caley Thistle Scottish Cup semi-final.
Bobby Madden will referee Sunday’s SPFL match between Hearts and the club founded by Charles Green in 2012l.