New signing Esmael Goncalves, Paul McGowan and Steven Thompson scored the goals for Saints in a 3-2 win at the National Stadium.
Craig Samson saved Charlie Mulgrew’s penalty to help Danny Lennon's side reach the final and they went on to beat Hearts 3-2 to lift the trophy.
🐼 Gonçalves 8'
— SPFL (@spfl) January 22, 2021
🍀 Hooper 45'
🐼 McGowan 63'
🐼 Thompson 69'
🍀 Mulgrew 90+3'
The Buddies came out on top in one of the all-time great semi-finals back in 2013!#SPFL | @saintmirrenfc pic.twitter.com/ofJfvuC9zO