Katie McMillan/Cameron Bryce (Stirling, SCO) qualified for the 2021 British Curling NCA Mixed Doubles Elite Finals playoffs, dropping their quarterfinals match 8-7 against Maggie Wilson/Robin Brydone (Stirling, SCO). of the 2021 British Curling NCA Mixed Doubles Elite Finals in Stirling, Scotland;
 
McMillan/Bryce finished 7-2 in the 0-team qualifying round. . In their opening game, McMillan/Bryce defeated Lauren Gray/Kyle Waddell (Stirling, SCO) 8-4, then won 7-3 against Eilidh Yates/Niall Ryder (Stirling, SCO). McMillan/Bryce went on to lose 10-5 against Jennifer Dodds/Bruce Mouat (Stirling, SCO). McMillan/Bryce responded with a 5-4 win over Jayne Stirling/Fraser Kingan (Stirling, SCO). McMillan/Bryce won 10-7 against Rebecca Morrison/Hammy McMillan Jr. (Stirling, SCO), then won 9-4 against Holly Davis/Euan Kyle (Stirling, SCO) and 13-3 against Sophie Sinclair/Duncan Menzies (Stirling, SCO). McMillan/Bryce won 11-4 against Nicola Joiner/Gregor Cannon (Stirling, SCO). McMillan/Bryce went on to lose 10-4 against Hailey Duff/Ross Whyte (Stirling, SCO) in their final qualifying round match.
 
McMillan/Bryce ranks th overall on the Year-to-Date rankings with points earned so far this season.