Julien Watrin (born 27 June 1992)[1] is a Belgian sprinter specialising in the 400 metres.
In 2023, he won his first individual major senior medal, with silver at the European Indoor Championships.
Watrin earned several major medals with national men's 4 × 400 m relays, including bronzes at the 2019 and 2022 World Athletics Championships.
He is the Belgian record holder for the 400 m hurdles, Belgian indoor record holder for the 400 m, and won several national titles.