In December 2018, it was announced Piastri would switch to reigning team champions R-ace GP for the 2019 championship.[14] He claimed his first victory in the series at Silverstone[15] and repeated with a second win at the same venue a day later.[16] He became the first driver to win three races in 2019 after taking victory at Spa-Francorchamps in July,[17] and became the champion after taking a win and fourth place at the final round at Yas Marina.[18]