Postpublished at 15mins
Livingston 1-0 St Mirren
St Mirren's first sight at goal, but Eamonn Brophy's effort from 25 yards is ambitious - too ambitious - and is wide of the mark.
Livingston will play St Johnstone in final on 28 February
Robinson heads in only goal early on after Ambrose effort hits bar
Clive Lindsay
Livingston 1-0 St Mirren
St Mirren's first sight at goal, but Eamonn Brophy's effort from 25 yards is ambitious - too ambitious - and is wide of the mark.
Livingston 1-0 St Mirren
Another blow for St Mirren as Ethan Erhahon is down holding his head after challenging Scott Pittman for a high ball.
However, the midfielder is back on his feet after the elbow on the top of his head.
Livingston 1-0 St Mirren
Steven Thompson
Former Scotland striker on BBC Sportsound
Quote MessageIt's young Brandon Mason who's meant to be marking Robinson at the initial cross. Jim Goodwin will be furious because you know Livingston possess that threat from dead balls
Livingston 1-0 St Mirren
Neil McCann
Former Hearts & Rangers winger on BBC Sportsound
Quote MessageIt's a really good ball in, coming in with pace and a bit of bend. Robinson's presence of mind is brilliant. He hasn't stopped moving once and powers the header into the back of the net
Scott Robinson
Livi have been the bigger threat early on and take the lead from one of the dead balls from which they are renowned.
Scott Robinson heads on a free-kick pumped into the penalty box, team-mate Efe Ambrose heads against the face of the crossbar, but the wee striker is there to nod in the rebound.
Livingston 0-0 St Mirren
Big former Celtic defender Efe Ambrose is down after an accidental arms in the face from St Mirren striker Eamonn Brophy.
The Nigerian recovers to receive an apology from his opponent.
Livingston 0-0 St Mirren
Steven Thompson
Former St Mirren striker on BBC Sportsound
Quote MessageTwo shots inside the first two minutes, both hit straight at Jak Alnwick - but good opportunities
Livingston 0-0 St Mirren
Livi are the first to threaten and Jon Guthrie, so often a goalscorer from defence, fires a shot at goal from just outside the penalty box, but it is straight at goalkeeper Jak Alnwick.
Seconds later, forward Josh Mullin does likewise. More power this time but same end product.
Livingston 0-0 St Mirren
Livingston get the game under way in their traditional all yellow, St Mirren in their usual black and white stripes.
St Mirren have lost three and won three League Cup semi-finals, while Livingston have won one and lost one. Who is going to the final this time?
Livingston v St Mirren (16:00)
The two sides emerge from the wide Hampden tunnel ideal for social distancing...
Livingston v St Mirren (16:00)
Steven Thompson
Former Scotland striker on BBC Sportsound
Quote MessageI know Neil thinks there will be goals, but think it is going to be very tight, but obviously I want St Mirren to win
Livingston v St Mirren (16:00)
Neil McCann
Former Hearts & Rangers winger on BBC Sportsound
Quote MessageIt is really open, so I think we are in for something special today. I am not going to predict a winner, but we could be in for something like a 3-2
Livingston v St Mirren (16:00)
Tom English
BBC Scotland's chief sports writer
Quote MessageI think Livingston's vibe will win this - by a goal after extra-time
Livingston v St Mirren (16:00)
Livingston v St Mirren (16:00)
Neil McCann
Former Hearts & Rangers winger on BBC Sportsound
Quote MessagePressure is always there from within, but unfortunately we're not going to get it from the fans as sometimes they can influence the game. This is where managers will earn their corn as their motivational abilities will be tested
Livingston v St Mirren (16:00)
Steven Thompson
Former Scotland striker on BBC Sportsound
Quote MessageThese teams don't get to semi-finals very often and it's heartbreaking that their fans don't have the chance to come to Hampden to see them
Livingston v St Mirren (16:00)
While Jim Goodwin's Paisley side are without a win in four outings, David Martindale remains unbeaten in 10 games since taking over at Livingston.
Indeed, the West Lothian side had won eight in a row until two commendable league draws with holders Celtic.
It has put them nine points and three places ahead of their Hampden rivals in the top flight, albeit fifth-top Livingston have played two games more.
St Mirren, though, have got here by knocking out two of Scotland's top four sides - Aberdeen and Rangers - and won both the Premiership meetings between the side's this season 1-0. Indeed, they were the last side to beat the West Lothian outfit.
Livingston v St Mirren (16:00)
This is St Mirren's first semi-final since winning the trophy in 2013, while Livingston last reached this stage in 2006, when they lost to Dunfermline Athletic.
Both Scottish Premiership clubs have only progressed further to lift the trophy once previously.
St Mirren, who won it in 2013 when Goodwin was captain, are aiming for a fourth appearance in the final, while Livingston are looking to end a 17-year wait to reach the final again since their only - but successful - appearance, when they defeated Hibs 2-0.
Livingston v St Mirren (16:00)
David Martindale spoke in midweek about having "to be efficient" in his bid to secure league points while saving energy for the semi-final with having to face Celtic in the Premiership on Wednesday.
He secured a point in a 2-2 draw despite making seven changes for that game and makes another eight here.
On-loan Monaco man Julien Sorrano, fellow defender Jon Guthrie and midfielder Scott Pittman are the only survivors.
Martindale says he is "gutted" that centre-half Ciaran Brown, on loan from Cardiff City, misses out through suspension after his fine goalscoring performance in midweek.
Livingston v St Mirren (16:00)
Clyde manager Danny Lennon described leading St Mirren to League Cup glory in 2013 as "real Roy Of The Rovers stuff" after beating Celtic in the semi-final before overcoming Hearts in the final.
He points out that it was "the making of" a certain John McGinn, the future Aston Villa and Scotland midfielder who bossed Celtic's Victor Wanyama, who himself would win a move to Southampton, in a "battle of the bums".
Of present St Mirren manager Jim Goodwin, Lennon says: "Jim was a great captain, good professional and good leader. To win it again as manager would be an incredible achievement.
"Today, it is all about who wants it more, who keeps their discipline and gets a wee break along the way."