An 11-year-old girl has called out the Australian Prime Minister for insisting on a public vote on same-sex marriage.

Isabella Mills, who has two mums, spoke on The Project on Thursday evening to explain why the Prime Minister is making a mistake by insisting on a costly plebiscite on equal amrriage.

Malcolm Turnbull, who is perceived as a moderate, took over as Prime Minister last year after his party voted to oust Tony Abbott – a strong conservative and opponent of same-sex marriage.

As a vote in Parliament loomed, Abbott put plans in place for a plebiscite (public vote) on equal marriage. His actions averted a showdown on the issue, but also caused a lengthy delay – as the plebiscite will not take place until  2017.

Turnbull has affirmed his support for the plebiscite, but equality activists have urged him to consider dropping the plans – and instead to allow a free vote to go ahead in Parliament.

Mills calls a plebiscite a “complete waste of time”, saying: “That 160 million dollars that you are willing to waste on a pointless plebiscite is totally unnecessary.

“I mean, the public has already expressed their views and made it quite clear that they want same-sex marriage for Australia. I may not be the Prime Minister, but even I know that Australia could use that money elsewhere.”

Check out the video below: