[2] 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 .

[8] Marlow's father is a professional musician, his grandfather also trained as an actor and his great-grandmother taught speech and drama.

[9] Marlow was educated at Abingdon School from 2008 to 2013,[10] and was a member of the Acorn Music Theatre Company in Henley.

[16] The musical received positive reviews at the 2017 Edinburgh Fringe Festival and went on to be performed in the West End in London.

[19] Six began previews on Broadway at the Brooks Atkinson Theatre on 13 February 2020 and was scheduled to open on 12 March 2020.