St Mirren booked their place in the final of the IRN-BRU Cup with a fantastic second half performance to see of The New Saints.
The Buddies scored four goals in the last 30 minutes to see off the Welsh side and set up a final clash with Dundee United.
It was a scrappy start to the match, though Stevie Mallan had three chances for the Buddies within the opening 20 minutes or so. His first came after just three minutes when he picked the ball up deep in the New Saints half before unleashing a shot that nestled safely into the arms of Paul Harrison who was keeping guard for TNS.
The midfielder then had a good opportunity on the 15th minute with a free kick from what has become known in Paisley as 'Mallan territory'. But he lashed the ball over the bar, as he did a few minutes later when he was laid off on the edge of the box by captain, Stephen McGinn.
The skipper then went close on the half hour mark when he picked the ball up after a Sutton knockdown. He took a touch to compose himself before seeing his effort curl just over the bar.
But the visitors soon grabbed a foothold in the match and should have been ahead when Ryan Brobbel's attempt was saved by Billy O'Brien. Soon after they won a corner from which Wes Fletcher should have scored as he header the ball off the outside of the post.
The warning signs were there and TNS would strike with just a few minutes left of the first half. It was a Brobbel again who burst through and curled the ball sweetly beyond O'Brien to send the small contingent of Welsh supporters wild.
Half Time: St Mirren 0-1 The New Saints
The Buddies came out of the traps after the break with half time substitute Lewis Morgan causing problems down the left side. His trickery won St Mirren a corner and a free kick with neither coming to anything. But it was a show of intent after a disappointing first half and got the fans
The match burst into life on the hour when the captain showed the way as he levelled the scores. It was a terrific strike from McGinn, his first since returning to the club in January, to put the home side back ahead.
Saints, buoyed by the equaliser, started to turn the screw with McGinn at the forefront. And the game was set to swing in St Mirren's favour when the captain was chopped down 25 yards from goal by Steven Saunders. The TNS defender picked up a red card for the foul and gave away a free kick in the process. Up stepped Mallan who curled it a low into the left hand corner of the net to put St Mirren ahead.
The Buddies were ahead and had a man advantage which they would really press home in the closing stages of the match. With just over 10 minutes to play the hosts won a penalty kick after Aeron Edwards hand-balled Morgan's attempted cross into the box. John Sutton stepped up to take but Harrison was equal to it as he dived the right way and pushed the ball wide.
However, that couldn't dampen things for the Buddies - or Sutton himself - as he scored just a minute after the miss. Kyle Magennis drove into the box before cutting the ball back for the Englishman, who would make no mistake as he cannoned the ball into the net.
And there was still time for Saints to add a fourth to cap off a fine second half display. Mallan laid off a free kick on the left side to the unmarked Rory Loy who fired it low beyond Harrison to put the seal on a good days work for the Buddies who will now have a cup final match against Dundee United to look forward to.
Full Time: St Mirren 4-1 The New Saints
St Mirren: O'Brien, Stelios, Davis, Baird, Eckersley (Irvine 90), McGinn (Fjelde 87), Storie (Morgan 45), Mallan, Magennis, Loy, Sutton
Subs Not Used: Langfield, Webster, Whyte, O'Keefe
TNS: Harrison, Spender, Marriot, Baker, Brobbel (Sergeant 68), Fletcher (Draper 81), Mullan, Saunders, Rawlinson, Cieslewicz (Quigley 68), Edwards
Subs Not Used: Wycherley, Leca, Darlington, Pryce
Referee: Keith Kennedy
Assistant Referee: Joseph Lawson
Assistant Referee: Anthony Cooper
Fourth Official: Greg Aitken
Attendance: 2044
