Jack Ross names the same starting eleven as the team that defeated Hibernian at the Paisley 2021 Stadium on Wednesday night.
Two goal hero Stelios Demetriou continues at left back while Stephen Mallan makes his 100th Buddies appearance.
Josh Todd is cup tied and replaced on the bench by Conor O'Keefe.
St Mirren: O'Brien, Irvine, MacKenzie, Davis, Stelios, Magennis, McGinn, Mallan, Smith, Morgan, Sutton
Subs: Langfield, Webster, Baird, O'Keefe, Storie, Fjelde, Loy
