Question: Are both David Giler and Brian G. Hutton film actors?
Context: Brian Geoffrey Hutton (January 1, 1935 – August 19, 2014) was an American actor and film director whose most notable credits are for the action films "Where Eagles Dare" (1968) and "Kelly's Heroes" (1970). Wild Seed is a 1965 film directed by Brian G. Hutton.  The movie was shot in black and white and featured two young actors, Michael Parks in his first role and Celia Kaye who was also a new upcoming actress. Zee and Co, also known as X, Y and Zee and Zee and Company, is a 1972 British film released by Columbia Pictures.  It was directed by Brian G. Hutton, and was based upon a novel by Edna O'Brien. Sol Madrid is a 1968 film directed by Brian G. Hutton and filmed in Acapulco.  It was released in the UK as The Heroin Gang. Alien is a 1979 science-fiction horror film directed by Ridley Scott, and starring Sigourney Weaver, Tom Skerritt, Veronica Cartwright, Harry Dean Stanton, John Hurt, Ian Holm and Yaphet Kotto.  The film's title refers to a highly aggressive extraterrestrial creature that stalks and attacks the crew of a spaceship.  Dan O'Bannon, drawing upon previous works of science fiction and horror, wrote the screenplay from a story he co-authored with Ronald Shusett.  The film was produced by Gordon Carroll, David Giler and Walter Hill through their company Brandywine Productions, and was distributed by 20th Century Fox.  Giler and Hill revised and made additions to the script.  Shusett was executive producer.  The eponymous Alien and its accompanying elements were designed by the Swiss artist H. R. Giger, while concept artists Ron Cobb and Chris Foss designed the more human aspects of the film. David Giler (1930) is an American filmmaker who has been active in the motion picture industry since the early 1960s. The Pad and How to Use It is a 1966 comedy film directed by Brian G. Hutton.  It was based on a one-act play by Peter Shaffer. Where Eagles Dare is a 1968 British World War II action film from Metro-Goldwyn-Mayer that stars Richard Burton, Clint Eastwood, Mary Ure, and Ingrid Pitt.  It was directed by Brian G. Hutton and shot on location in Austria and Bavaria.  Alistair MacLean wrote the novel of the same name and the screenplay at the same time.  It was his first screenplay; both film and book became commercial successes. The National Film Actors' Theatre or State Theatre of Cinema Actors (Russian - Государственный театр киноактёра) is a theatre company in Moscow, Russia, founded in December 1943 by the Council of People's Commissars to train film directors and film actors and to provide work for film actors between shoots.  It is housed in a building originally built as a house of culture for political prisoners by two of the Vesnin brothers between 1931 and 1935.  It is located at 33 Povarskaïa Street in the north of the Arbat District in the Central Administrative Okrug.  Since 2013 its director has been V. Baycher. Kelly's Heroes is a 1970 war comedy film directed by Brian G. Hutton about a group of World War II American soldiers who go AWOL to rob a bank behind enemy lines.  The film stars Clint Eastwood, Telly Savalas, Don Rickles, Carroll O'Connor, and Donald Sutherland, with secondary roles played by Harry Dean Stanton, Gavin MacLeod, and Stuart Margolin.  The screenplay was written by British film and television writer Troy Kennedy Martin.  The film was a US-Yugoslav co-production, filmed mainly in the Croat village of Vižinada on the Istria peninsula.
Answer: no