Stephen Grellet (2 November 1773 – 16 November 1855) was a prominent Quaker missionary. Born Etienne de Grellet du Mabillier, son to a counsellor of King Louis XVI, at 17 he entered the King's body-guard; during the French Revolution of 1792 he was sentenced to be executed, but escaped and eventually fled Europe to the United States in 1795, where in 1796, he joined the Religious Society of Friends.