In August 2023, Bielle-Biarrey made his debut for
France during a 25–21 defeat to
Scotland during the
2023 Rugby World Cup warm-up matches. In January 2025, he scored two tries against
Wales in the opening fixture of the
2025 Six Nations. The following week he scored another two tries in a 26–25 defeat to
England. Having scored another try in the victory over
Italy, he then scored twice in
Dublin against
Ireland, setting a record for the most tries scored by a French player in a Six Nations campaign (7 tries). By scoring on the final day of competition against Scotland, he became the top single year try-scorer in the history of the Six Nations Tournament with eight tries. He also won the final with France and was voted the tournament's best player for the 2025 edition. He was also selected for the French squad to feature in the
2026 Six Nations. In February 2026, he scored two tries in the opening fixture of the tournament during a 36–14 victory against Ireland. In March 2026, in the final fixture of the tournament, he scored four tries during a 48–46 victory against England as France won the title, breaking his own record set the previous year with nine tries in the tournament, and having scored a try in every match of both years’ events. Following the end of the campaign, he won player of the tournament for a second consecutive year. == Career statistics ==