The pair are now the second Australians to win gold at the Junior Grand Prix Final, joining Ekaterina Alexandrovskaya and Harley Windsor who won the prestigious event in 2017.
The end of year ISU Grand Prix Final brings together the six best juniors and six best senior skaters in each discipline to determine the best of the best.
The short program saw the pair ranked second, 3.13 points behind first place after scoring 60.19 points.
In the final free program skate, the pair put in a dominant showing with the highest score of the round with 121.18 points, moving into the gold medal position with a combined total score of 181.37.
Rounding out the podium was Sophia Baram and Daniel Tioumentsev of the USA with a total score of 176.78 and fellow Americans Cayla Smith and Andy Deng in third with 150.51.