
Christopher Haden-Guest, 5th Baron Haden-Guest (born February 5, 1948), known professionally as Christopher Guest, is an American and British actor, comedian, screenwriter and director. Guest has written, directed, and starred in his series of comedy films shot in mockumentary style. He co-wrote and acted in the rock satire This Is Spinal Tap (1984), and later directed a string of satirical mockumentary films such as Waiting for Guffman (1996), Best in Show (2000), A Mighty Wind (2003), For Your Consideration (2006), and Mascots (2016). He also acted in the films Death Wish (1974), Little Shop of Horrors (1986), The Princess Bride (1987), and A Few Good Men (1992); and was a regular cast member on the 10th season of Saturday Night Live.
Guest holds a hereditary British peerage as the 5th Baron Haden-Guest. He was active in the House of Lords until the 1999 reform abolished his seat. When using his title, he is normally styled as Lord Haden-Guest. Guest is married to the actress Jamie Lee Curtis.
Description above from the Wikipedia article Christopher Guest, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Small Soldiers
1998 · as Slamfist / Scratch-It (voice)

A Few Good Men
1992 · as Dr. Stone

The Princess Bride
1987 · as Count Rugen

This Is Spinal Tap
1984 · as Nigel Tufnel

Night at the Museum: Battle of the Smithsonian
2009 · as Ivan the Terrible

Little Shop of Horrors
1986 · as The First Customer

Death Wish
1974 · as Patrolman Reilly

The Invention of Lying
2009 · as Nathan Goldfrappe

Best in Show
2000 · as Harlan Pepper

The Long Riders
1980 · as Charlie Ford

A Mighty Wind
2003 · as Alan Barrows

For Your Consideration
2006 · as Jay Berman

The Hot Rock
1972 · as Policeman

The Fortune
1975 · as Boy Lover

Spinal Tap II: The End Continues
2025 · as Nigel Tufnel

The Hospital
1971 · as Resident (uncredited)

Waiting for Guffman
1997 · as Corky St. Clair

Girlfriends
1978 · as Eric