Rangers face an all Premiership clash at Ibrox as they discovered their last eight fate.
Russell Martin's men survived a scare from Alloa to run out 4-2 winners to book a quarter-final spot and will come up against the winner of the tie between Livingston or Hibs.
Partick Thistle are the final non top flight team in the competition and they were rewarded with a home clash against holders Celtic after dumping out Ayr United.
Brendan Rodgers' men hammered league rivals Falkirk on Friday night and it is a short trip to Firhill as they look to book another Hampden day out.
St Mirren ended Hearts' hopes of a League Cup triumph with a penalty shootout win and they will be watching on with keen eyes at Kilmarnock vs Dundee United on Sunday with the Buddies heading for the winner.
Aberdeen and Motherwell make up the quarter-final with the pair squaring off at Pittodrie.
The four winners at this stage will book a place in the last four and head for the national stadium and move that one step closer to glory.
Quarter-final draw in full
Kilmarnock or Dundee United vs St Mirren
Partick Thistle vs Celtic
Rangers vs Livingston or Hibs
Aberdeen vs Motherwell
5 talking points from Ibrox
The draw is just about to get underway in the next couple of minutes.
Rangers booked their spot in the last eight - but it wasn't without a scare from League One Alloa at Ibrox.
Check out our man Fraser Wilson's 5 talking points from the last 16 showdown.
Sunday's double-header
Dundee United and Hibs experienced mixed fourtunes in Europe on Thursday night.
But the dream of League Cup success is on and they need to get ready for Sunday battles.
Jim Goodwin's men travel to Rugby Park to face Kilmarnock while it is Livingston on the road for the Hibees.
Both games get underway at 3pm tomorrow.
When is the last eight played?
Just a reminder of the important dates for the diary.
This stage of the competition takes place across the weekend of September 20/21.
Dates will be firmed up once the ties are drawn and TV selections made.
Not long now..
The draw will be coming any time soon.
Who would you like to see paired in the quarter-finals?
Hampden is the big prize on offer at this stage with the last four getting a day out at the National Stadium.
At this stage of the competition, everyone one in the hat is dreaming of glory!
Who is in the draw?
So that is six of the eight teams confirmed for the last eight.
Celtic, Aberdeen, Partick Thistle, Motherwell, St Mirren and Rangers are all confirmed.
Two of Kilmarnock, Dundee United, Livingston and Hibs will join them by close of play tomorrow.
But they will all be part of the draw and will know the prize on offer for winning their last 16 ties.
Rangers into the last eight
Rangers are into the quarter-final draw.
But it wasn't the comfortable afternoon the fans or Russell Martin would have been hoping for.
It's a 4-2 win for the Light Blues as they defeat League One Alloa to join the last eight party.
What is happening at Ibrox?
Well, we could be made to wait for the draw.
Alloa are pushing Rangers all the way with Russell Martin's men ahead 3-2 as the clock ticks down.
Will we get extra time? Follow all the action here.
What about the Dons?
They have the Scottish Cup in the trophy cabinet, so why not add the Premier Sports Cup?
It was a comfortable afternoon for Aberdeen as they strolled beyond Morton in a 3-0 win.
Will they get a favourable draw?
St Mirren vs Hearts talking points
It's a result that has raised eyebrows - so what should you take away from the game? Record Sport has you covered.
The action as it stands
Rangers are ahead against Alloa - but only just.
You can keep up to date with the second half with us right here.
Who has still to come?
Kilmarnock vs Dundee United and Livingston vs Hibs will take place on Sunday - but they go into the hat tonight!
Pushed all the way
But it's all Well for Well.
One goal was enough for the Steelmen in extra time to see off St Johnstone.
Hearts crashing out
Derek McInnes has enjoyed an impressive start to life at Tynecastle - but the Premier Sports Cup WON'T be coming to Gorgie this season.
St Mirren secured penalty shoot-out victory in Paisley.
When is the draw?
The draw will follow the conclusion of Rangers vs Alloa Athletic at Ibrox.
The match itself gets underway at 5.45pm.
So if the game ends in the original 90 we are looking at around a 7.45pm-ish start by the time the game is over and the draw is ready to go.
Hello and welcome!
Good evening!
It is an unusual Saturday night draw for the Premier Sports Cup.
But have no fear, Record Sport are all over it and will bring you all the build-up and big draw news as and when it happens.
