Christopher dropped the Haden from his surname when he started going to acting auditions in his 20s; he thought it sounded long-winded and distracting.

Son-in-law of Tony Curtis and Janet Leigh.

Was the muse for an Asian-American short comedic film entitled Pax Importi Modellus: The Rise of the Import Model (2004), which has gained international attention.

Attended the House of Lords regularly until the passage of the House of Lords Act 1999 barred most hereditary peers from their seats.

Lived in New York in the 1960s.

Half-brother of journalist Anthony Haden-Guest, the bibulous English socialite and journalist satirized by 'Tom Wolfe' in The Bonfire of the Vanities (1990).

Guest shoots 10-minute scenes to let the improvisations unfold organically and ends up with about 60 hours of film, which is then edited down over a year and a half to 90 minutes.

His character from This Is Spinal Tap (1984), Nigel Tuffnel, is partially a spoof of British rocker Jeff Beck

His idol growing up was comedian Peter Sellers.

When a publicity photo of Guest and his co-stars from This Is Spinal Tap (1984) ran in Rolling Stone magazine, Jamie Lee Curtis saw the picture, fell in love and gave her phone number to Guest's agent. They dated and eventually married.

Guest became the 5th Baron Haden-Guest, of Saling in the County of Essex, when his father died in 1996.

Brother-in-law of actress Kelly Curtis and Pamela Guest.

Brother of actor Nicholas Guest, who is heir presumptive to the family title. (as Christopher's children are adopted, they cannot inherit the barony.)

Guest's mother was American of Jewish descent, his father was an British hereditary lord (Peter Haden-Guest, an actor and dancer who ended up a UN diplomat).

In 2005, announced his intention to stop making mockumentary films, because he doesn't find them funny anymore.

Has two adopted children, Annie (December 1986) and Thomas (March 1996). Under the terms of the letters patent that created the Barony of Haden-Guest, they cannot inherit the title, but they can use the courtesy title of the Honourable before their first names.