John Spurley Challis was an English actor. He had an extensive theatre and television career but is best known for portraying Herman Aubrey "Boycie" Boyce in the long-running BBC Television sitcom Only Fools and Horses (1981–2003) and its sequel/spin-off The Green Green Grass (2005–2009), as well as Monty Staines from the seventh series onwards in the ITV sitcom Benidorm (2015–2018). Challis was an established stage actor, making appearances for companies including the Royal Shakespeare Company and the National Theatre.

Herman Aubrey "Boycie" Boyce is a fictional character in the BBC sitcom Only Fools and Horses, played by John Challis. His story is continued in the spin-off series The Green Green Grass in which Boycie and his family flee to the countryside to escape from the Driscoll Brothers. A younger Boycie also appears in the prequel series Rock & Chips. Along with Denzil, he is one of only two characters to appear in all three.