Consistently contributed in Adelaide’s inaugural Premiership in 2017, after being a 16th round selection in the 2016 AFLW Draft. Had a breakout year in 2018, finishing runner up in the Club Champion and earning the Best Defensive Player Award. Became a two-time premiership player in 2019 as the rock of Adelaide’s defence. After two All Australian nominations, Allan earned her first selection in the team in 2020 after another solid year.