Jonathan Percy Starker Saxe (born March 23, 1993), known professionally as JP Saxe, is a Canadian musician and singer-songwriter. He is best known for his collaboration with American singer and his now girlfriend Julia Michaels titled "If the World Was Ending" which was released on October 17, 2019. The song was nominated for a 2021 Grammy. His grandfather, noted cellist János Starker, was a multiple nominee and Grammy winner.