The Quarter-Final line-up is confirmed after a busy weekend which saw all the Premiership clubs involved progress.
Motherwell, Dundee United and St Mirren were first to book their places into next week's Fifth Round draw following a busy Friday night of action.
At Fir Park, Motherwell and Greenock Morton fought out a cagey affair with the match going the distance, into extra-time. Stephen O’Donnell smashed home an incredible drive from 35 yards in the dying moments of the second period of extra-time and thought he’d secured the victory. It wasn’t quite so straightforward though as Fjortoft thumped home a corner in the last minute.
Despite being denied the chance of becoming the match winner in extra-time, Stephen O’Donnell stepped up in the shoot-out to deliver the decisive blow and ensure Motherwell emerged as 5-3 winners on penalties.
St Mirren began the Fourth Round action a earlier in the night with a hard-fought 2-1 win against Inverness on a sun-kissed evening in Paisley.
It looked ominous for Jim Goodwin’s side when Inverness took the lead in the second half through Nikolay Todorov. Kristian Dennis equalised almost immediately from 18 yards out before Marcus Fraser secured St Mirren’s place in the next round, scoring his fourth goal of the season, tapping the ball home from close range.
In the televised match of the day, Dundee United’s Peter Pawlett was the hero on a night where they toiled against League 1 Forfar.
Without a home league win in over 14 months, Forfar started brightly but Micky Mellon's Premiership sides breathed a huge sigh of relief as Pawlett broke the deadlock after 56 minutes and set up an away tie against either Aberdeen or Livingston in the last eight.
In a rare Saturday morning kick-off Kilmarnock Laferty, Pinnock and Burke gave the home side a comfortable lead. Cameron Ballantyne grabbed a consolation eight minutes from time. Kilmarnock will now take on St. Mirren in the next round.
Betred Cup winners St. Johnstone swept aside Clyde 2-0 later that day and Aberdeen and Livingston fought out an entertaining 2-2 draw which went all the way to penalties. Ross McCrorie coolly dispatched the winning spot-kick.
On Sunday, Hibernian cruised to a 4-0 victory over Stranraer before Rangers overcame rivals Celtic to secure their place in the Quarter-Final draw.
Scottish Cup Fourth Round Results
Friday, 16 April
St. Mirren 2-1 Inverness Caledonian Thistle
Motherwell 1-1 Greenock Morton (aet; Motherwell win 5-3 on pens)
Forfar Athletic 0-1 Dundee United
Saturday, 17 April
Kilmarnock 3-1 Montrose
St. Johnstone 2-0 Clyde
Aberdeen 2-2 Livingston (aet; Aberdeen win 5-3 on pens)
Sunday, 18 April
Stranraer 0-4 Hibernian
Rangers 2-0 Celtic
Scottish Cup Fifth Round Draw
Weekend of the 24th April
Aberdeen v Dundee United
Kilmarnock v St Mirren
Rangers v St Johnstone
Hibernian v Motherwell