Jack Miller debuted in Moto3 in 2012 with Carretta Technology Forward Racing and although the bike was not as competitive as the rest, he was able to learn from the experience and get to know the tracks better. In 2013, Miller moved to Racing Team Germany and was able to improve his results with 13 points-scoring finishes and a best result of 5th place. In 2014, Miller moved to the factory supported KTM team, Red Bull KTM Ajo. He had an incredible season with six victories and finishing second in the championship behind Alex Marquez. 

In 2015, Miller made the jump from Moto3 to MotoGP to ride for the Team LCR alongside Cal Crutchlow. He achieved his best finish of 11th place in Catalunya and finished the season in 19th overall. Miller moved to Marc VDS Racing Team for the 2016 season. The Aussie claimed his first premier class victory in Assen during a wet race and became the first Australian to win a MotoGP race since Casey Stoner in 2012. He continued with the team for 2017 and recorded nine top-10 finishes to finish the season in 11th overall. 2018 was the start of Miller’s Ducati journey as he joined the Pramac Racing team. He remained with the team from 2018 until the end of 2020 and recorded a great deal of podiums and decent results for the team. 2021 was the year that Miller moved up to the Factory Ducati team and he had a strong season with wins in both Jerez and Le mans and throughout the season he scored a handful of podiums to finish the year in 4th overall. 2022 was another strong season for Miller with 1 race win and 6 further podiums to round off his time with the Italian factory. In 2023, Miller will be riding for the Factory KTM team alongside Brad Binder.