Question: Which director, Christopher Guest or Elem Klimov, is known for writing, directing and starring in his movies?

Passages:
David Jablin is an award winning comedy producer and director and one of the pioneers of original television programming for Pay Television.  In 1981 he created and produced the innovative comedy anthology series "Likely Stories" for HBO/Cinemax, which featured the directing debuts of Rob Reiner, Danny DeVito, Christopher Guest, and Billy Crystal. Adventures of a Dentist (Russian: Пoхoждения зубногo врача , "Pokhozhdyeniya zubnovo vracha " ) is a 1965 Soviet dark comedy/drama feature film directed by Elem Klimov on Mosfilm.  It is currently unavailable on video or DVD for any audience, but is occasionally screened at film festivals. Christopher Haden-Guest, 5th Baron Haden-Guest (born February 5, 1948), simply known as Christopher Guest, is an English-American screenwriter, composer, musician, director, actor, and comedian who holds dual British and American citizenship.  Guest is most widely known in Hollywood for having written, directed and starred in his series of comedy films shot in mock-documentary (mockumentary) style.  Many scenes and character backgrounds in Guest's films are written and directed, although actors have no rehearsal time and the ensemble improvise scenes while filming them.  The series of films began with "This Is Spinal Tap" (directed by Rob Reiner), and continued with "Waiting for Guffman", "Best In Show", "A Mighty Wind", "For Your Consideration", and "Mascots". Aleksei Vasilyevich Petrenko (Russian: Алексей Васильевич Петренко ; 26 March 1938 – 22 February 2017) was a Soviet and Russian film and stage actor.  He played Grigori Rasputin in the Elem Klimov's historical drama Agony (Russian: Агония , "Agoniya " ; U.S. theatrical/DVD title "Rasputin") is a film by Elem Klimov, made c.1973-75 and released in Western and Central Europe in 1982 (USA and Soviet Union 1985), after protracted resistance from Soviet authorities.  The film is notable for its rich, sometimes baroque style, its sumptuous recreation of episodes from the final year of Imperial Russia and the psychological portraits of Grigori Rasputin and the Imperial family. The 14th Moscow International Film Festival was held from 28 June to 12 July 1985.  The Golden Prizes were awarded to the Soviet film "Come and See" directed by Elem Klimov, the American film "A Soldier's Story" directed by Norman Jewison and the Greek film "The Descent of the Nine" directed by Christos Siopahas. Elem Germanovich Klimov (Russian: Эле́м Ге́рманович Кли́мов ; 9 July 1933 – 26 October 2003) was a Soviet Russian film director.  He studied at VGIK, and was married to film director Larisa Shepitko.  Klimov is best known in the West for his final film, 1985's "Come and See" ("Иди и смотри"), which follows a teenage boy in German-occupied Belarus during the German-Soviet War and is often considered one of the greatest war films ever made.  He also directed dark comedies, children's movies, and historical pictures. Farewell (Russian: Прощание ) is a 1983 Soviet drama film based on Valentin Rasputin's novel "Farewell to Matyora" and directed by Elem Klimov. Come and See (Russian: Иди и смотри , "Idi i smotri"; Belarusian: Ідзі і глядзі , "Idzi i hlyadzi") is a 1985 Soviet war drama film directed by Elem Klimov, with a screenplay by Klimov and Ales Adamovich, starring Aleksei Kravchenko and Olga Mironova.  Set during the Nazi German occupation of the Byelorussian SSR, the film follows a young boy as he witnesses the atrocities committed on the populace. Welcome, or No Trespassing (Russian: Добро пожаловать, или Посторонним вход воспрещён , "Dobro pozhalovat, ili Postoronnim vkhod vospreshchyon " ) is a Soviet movie by Elem Klimov made in 1964.  It is a satirical comedy about the excessive restrictions that children face during their vacation in a Young Pioneer camp, imposed by their masters.  Most of the actors are children, while the protagonist is the director Dynin, played by Yevgeniy Yevstigneyev.  The film was selected to be screened in the Cannes Classics section of the 2015 Cannes Film Festival.

Supporting sentences:
Christopher Haden-Guest, 5th Baron Haden-Guest (born February 5, 1948), simply known as Christopher Guest, is an English-American screenwriter, composer, musician, director, actor, and comedian who holds dual British and American citizenship.  Guest is most widely known in Hollywood for having written, directed and starred in his series of comedy films shot in mock-documentary (mockumentary) style.  He also directed dark comedies, children's movies, and historical pictures.