James Austin Cyr, known professionally as London Cyr, is a Canadian record producer, songwriter and audio engineer. He first gained recognition for co-producing "Can't Say" from Travis Scott's 2018 album Astroworld, a song that has been certified triple platinum by the Recording Industry Association of America (RIAA) and that earned Cyr a nomination certificate when the album was nominated for Best Rap Album at the 61st Annual Grammy Awards.