Australia was represented at the Junior Eurovision Song Contest 2017 which took place on 25 November 2017, in Tbilisi, Georgia. The Australian broadcaster ABC is responsible for choosing their entry for the contest. Isabella Clarke was internally selected to represent Australia in Georgia. Her song for the contest, "Speak Up", was revealed on 7 October 2017.
Prior to the 2017 Contest, Australia had participated in the Junior Eurovision Song Contest twice since its debut in , with the song "My Girls" performed by Bella Paige. In , Alexa Curtis represented Australia with the song "We Are", achieving fifth place.
On 10 September 2017, it was announced that Isabella Clarke had been internally chosen by the broadcaster to represent Australia. She started singing when she was nine. The prior two years she had performed at The Victorian State Schools Spectacular in Australia. Clarke's song "Speak Up" was revealed on 7 October 2017.
During the opening ceremony and the running order draw which took place on 20 November 2017, Australia was drawn to perform fifteenth on 26 November 2017, following Serbia and preceding Italy.