Toby Marlow (born 12 October 1994) is a British musical theatre composer, lyricist, playwright, writer, and actor best known for co-creating the international hit musical Six with Lucy Moss. Six received five Olivier Award nominations, including Best New Musical and Outstanding Achievement in Music. Marlow and Moss went on to win the Tony Award for Best Original Score in 2022. Marlow is also co-creator of Hot Gay Time Machine, a musical comedy cabaret show directed by Lucy Moss, in which he co-stars with Zak Ghazi-Torbati .