His first wife was model Jenny Rylance (1968–1973).
In 1967, Marriott wrote the evocative rock-ballad “Tin Soldier” to woo model Jenny Rylance. They first met in 1966 and Marriott was immediately smitten, but Rylance was dating up-and-coming singer Rod Stewart and so the two became friends. She later broke up with Stewart and had a brief romantic liaison with Marriott, but much to his disappointment ended it to go back to Stewart. Rylance and Stewart later split for good after a rocky four-year relationship; when Marriott found out he pursued her relentlessly, leading him to write “Tin Soldier”. The song was a hit for the band in 1967 and for Marriott a personal triumph.
He and Rylance were married at Kensington Register Office, London, on 29 May 1968.