Jonathan Percy Starker Saxe (born March 23, 1993), known professionally as JP Saxe, is a Canadian musician and singer. He is best known for his collaboration with American singer and his now ex-girlfriend Julia Michaels titled "If the World Was Ending" which was released in 2019. The song was nominated for a 2021 Grammy. His "hero" grandfather, noted cellist János Starker, was a multiple nominee and Grammy winner.
Source: Wikipedia (https://en.wikipedia.org/wiki/JP_Saxe)