A former Junior Springbok, Edwill van der Merwe has proved himself as a class act at wing within the South African rugby structures in the last few years, and this paid off with his first call-up to the Springbok team in 2024, where he made his Test debut against Wales in the opening match of the season in London, scoring a try on debut. He missed some action due to injury and returned in 2025, scoring five tries in four matches before his season was cut short due to injury again.