Trivia

Fox left the acting profession for nine years (1970-1979) after he filmed Performance (1970) with Mick Jagger. A combination of his father's recent death, the strain of filming and smoking the hallucinogen DMT with Mick Jagger led to a nervous breakdown. Fox subsequently joined a religious organisation known as "The Navigators" which is similar to the Gideons and is closely associated with the ministry of Billy Graham.

He played King George V and his son Laurence Fox played King George VI in W.E. (2011). His elder brother Edward Fox played George V's son and successor King Edward VIII (the Duke of Windsor) in Edward & Mrs. Simpson (1978).

Joint winner with Julie Christie of the 1963 Variety Club of Great Britain Most Promising Newcomer Award.

Had a relationship with the actress Sarah Miles in the early 1960s.

He was cast as Lord William Holmes in Patriot Games (1992) after his elder brother Edward Fox left the film.

His Patriot Games (1992) cast mate, Richard Harris, was also his niece's former father-in-law.

He replaced actor John Woods in the Old Vic's early 2006 production of the Arthur Miller play "Resurrection Blues", which was directed by Robert Altman in his London theatrical debut, one month before previews began. The play was widely panned by critics, partly due to the divergent acting styles of the eclectic cast assembled by Robert Altman, which included the Austrian actor Maximilian Schell as Fox's character's cousin.

Former brother-in-law of Tracy Reed, Celestia Fox and Natasha Richardson. Brother-in-law of Fiona Golfar (Robert's third wife) and Joanna David (Edward's second wife).

Considered for the role of Dr. Armstrong in Lifeforce (1985).

Appeared with Sarah Miles on the West End stage in Chekov and in the film The Servant which earned them both Accademy mentions.

He was Sarah's steady boyfriend for a while.