- His father trained racehorses; his mother was a niece of the Earl of Huntingdon.
- Was a classmate of actor Christopher Lee at boarding school; the two died within a couple of weeks of each other in June 2015.
- Was expelled from college for being a bookie.
- Served during WWII in the Royal Navy.
- Became a U.S. citizen in 1959.
- His 1964 song "Kinky Boots" (recorded with actress Honor Blackman) became a top 10 British single in 1990.
- Appeared in The Pretenders video "Don't Get Me Wrong" and in the Oasis video "Don't Look Back in Anger."
- Authored an autobiography (Blind in One Ear) and several books about his TV series The Avengers.
- Dorothea Hastings — Mother
- Rupert Macnee — Son
- Kate Woodville — Ex-wife
- James Macnee — Brother
- Barbara Douglas — Ex-wife
- Baba Majos de Nagyzsenye — Wife (deceased)
- Daniel Macnee — Father
- Jennifer — Daughter
- Attended Webber Douglas Academy of Dramatic Art, London, England