Controversial former Liberal MP Sophie Mirabella has dubbed Social Services Minister Scott Morrison the "next conservative prime minister of Australia" during a fundraiser that has set tongues wagging.

Mr Morrison was guest speaker at a Liberal Party fundraiser held at the home of Mrs Mirabella, the former MP for the seat of Indi, on Saturday.

Former MP Sophie Mirabella and Social Services Minister Scott Morrison at a Liberal Party event in Indi in May.

There is growing speculation Mrs Mirabella could run against the woman who beat her at the 2013 poll, independent Cathy McGowan, at the 2016 federal election.

"I miss Sophie and Sophie's representation has been something really lacking in Parliament," Mr Morrison told The Border Mail.