Jack Ross names the same starting eleven as the side that beat Airdrieonians 5-0 in the Betfred Cup last weekend.
Gavin Reilly, who scored a brace in the win over the Diamonds, is once again partnered upfront by John Sutton.
Stephen McGinn skippers the side for the first Ladbrokes Championship game of the season, while Adam Eckersley returns to the bench after a spell out with injury.
St Mirren: Samson, Irvine, Baird, MacKenzie, Stelios, McShane, McGinn (c), Morgan, Smith, Sutton, Reilly
Subs: Stewart, Buchanan, Whyte, Eckersley, Kirkpatrick, Stewart, O'Keefe
