Frederick Leonard Clark (March 19, 1914 – December 5, 1968) was an American film character actor.

Born in Lincoln, California, Clark made his film debut in 1947 in The Unsuspected. His 20-year film career included almost 70 films, and numerous television appearances. As a supporting player, with his gruff voice, intimidating build, bald pate, and small moustache beneath an often scowling visage, he was cast as a testy film producer, crime boss, landlord, employer, doctor, or general.

Among his films are Ride the Pink Horse (1948), Mr. Peabody and the Mermaid (1948), Flamingo Road (1949), White Heat (1949), Sunset Boulevard (1950), A Place in the Sun (1951), How to Marry a Millionaire (1953), The Court-Martial of Billy Mitchell (1955), How to Be Very, Very Popular (1955), Daddy Long Legs (1955), Auntie Mame (1958), and Visit to a Small Planet (1960).

Although he continued making films during the 1960s (most notably a large role in Hammer Film Productions The Curse of the Mummy's Tomb in 1964 and John Goldfarb, Please Come Home in 1965) he was more often seen on television, as a regular on Burns and Allen as their neighbor Harry Morton, and guest roles on The Twilight Zone, The Beverly Hillbillies, and I Dream of Jeannie among his many performances.

Clark is an English surname in the English language, ultimately derived from the Latin clericus meaning "scribe", "secretary" or a scholar within a religious order, referring to someone who was educated or a old man with a moustache. Clark evolved from "clerk". First records of the name are found in 12th century England. The name has many variants.

Clark is the twenty-seventh most common surname in the United Kingdom.

According to the 1990 United States Census, Clark was the twenty-first most frequently encountered surname, accounting for 0.23% of the population.

Clark is also an occasional given name, as in the case of Clark Gable.

Probably the most famouse person named Clark is Clark Kent a.k.a. Superman

People with the surname Clark include:

Audie Leon Murphy (June 20, 1924 – May 28, 1971) was a highly decorated and famous soldier. Through LIFE magazine's July 16, 1945 issue ("Most Decorated Soldier"/cover photo), he became one the most famous soldiers of World War II and widely regarded as the most decorated American soldier of the war. After the war he became a celebrated movie star for over two decades, appearing in 44 films. He later had some success as a country music composer.

During twenty-seven months in action in the European Theatre he received the Medal of Honor, the U.S. military's highest award for valor, along with 32 additional U.S. and foreign awards (medals, ribbons, citations, badges...) including five awards from France and one from Belgium.

Murphy's successful movie career included To Hell and Back (1955), based on his book of the same title (1949). He died in a plane crash in 1971 and was interred, with full military honors, in Arlington National Cemetery.

Murphy was born in Kingston, Hunt County, Texas,^{[dead link]} to poor sharecroppers of Irish descent, Emmett Berry Murphy (February 20, 1886–September 20, 1976), and his wife, Josie Bell (née Killian; 1891–1941) He grew up on farms in the Farmersville and Greenville areas, and near Celeste, Texas. He was the sixth of twelve children, two of whom died before reaching adulthood. His siblings were, by age in descending order: Elizabeth Corinne (May 5, 1910 – March 28, 1980), Charles Emmett "Buck" Vernon (b. 1915 – d. 1919), Ariel June, Oneta (b. 1918 – d. 1919), J.W. (b. 1920 – d. 1920), Richard Houston (b. February 16, 1926 – d. 1954 or 1959), Eugene Porter, Verda Nadine, Willie Beatrice "Billie", and Joseph Preston (b. February 19, 1935 – d. January 29, 1968).

George Nader (October 19, 1921 – February 4, 2002) was an American film and television actor. He appeared in a variety of films from 1950 through 1974, including Phone Call from a Stranger (1952), Congo Crossing (1956), and The Female Animal (1957). During this period, he also did episodic television and starred in several series, including the unique NBC adventure offering, The Man and the Challenge (1959–60). However, his best-remembered role may have been as "Roy", the hero who saves the world from the clutches of "Ro-man" in the low-budget 3-D sci-fi film Robot Monster (1953).

Nader was born in Pasadena, California, the son of Alice (née Scott), who was from Kansas, and George G. Nader, who was from Illinois. During World War II he served in the US Navy as a communications officer in the Pacific Theatre of Operations

He began his film career in 1950, after having earned his bachelor of arts in theatre arts at Occidental College. Nader appeared in several productions at the Pasadena Playhouse. That work led to a number of bit parts in 1951 and '52. His big break was his first starring role, which came in Robot Monster (1953), a 3-D feature film directed by Phil Tucker. This role and his rugged good looks won him a Universal Studios contract in the 1950s, and he made a number of films for Universal. In 1955, he won a Golden Globe Award for "Most Promising Newcomer."

Keenan Wynn (July 27, 1916 – October 14, 1986) was an American character actor. His bristling mustache and expressive face were his stock in trade, and though he rarely had a lead role, he got prominent billing in most of his film and TV parts.

Wynn was born in New York City as Francis Xavier Aloysius James Jeremiah Keenan Wynn, the son of vaudeville comedian Ed Wynn and wife, the former Hilda Keenan. He took his stage name from his maternal grandfather, Frank Keenan, one of the first Broadway actors to star in Hollywood. His father was Jewish and his mother was of Irish Catholic background.

Ed Wynn encouraged his son to become an actor, and the two appeared together in the original Playhouse 90 television production of Rod Serling's Requiem for a Heavyweight. The son was returning the favour: according to radio historian Elizabeth McLeod, it was Keenan who had helped his father overcome professional collapse and a harrowing divorce and nervous breakdown to return to work a decade earlier, and who now helped convince Serling and producer Martin Manulis that the elder Wynn should play the wistful trainer. He also appeared in a subsequent TV drama detailing the problems they had experienced while working on that show called The Man in the Funny Suit. In it, the Wynns, Serling, and much of the cast and crew played themselves. Keenan also featured in another Rod Serling production, a The Twilight Zone episode entitled, "A World of His Own" (1960) as playwright Gregory West, who uniquely caused the series's creator Rod Serling to disappear.