George O'Brien (April 19, 1899 - September 4, 1985) was an American actor, popular during the silent film era and into the talkie era of the 1930s.

Born in San Francisco, California, O'Brien was the elder son of Daniel J. and Margaret L.(Donahue) O'Brien; O'Brien's father later became the Chief of Police for the City of San Francisco (Dan O'Brien ordered the arrest of Roscoe "Fatty" Arbuckle in September of 1921) and, after his retirement from that office, the Director of Penology for the State of California.

In 1917 O'Brien enlisted in the United States Navy to fight in World War I, serving on a Submarine chaser. He volunteered to act as a stretcher bearer for wounded Marines and was decorated for bravery. Right after the war O'Brien became Light Heavyweight champion of the Pacific Fleet.

The young war veteran came to Hollywood, California in his early twenties hoping to become a cameraman and did work as an assistant cameraman for a while, for both Tom Mix and Buck Jones. He began his acting career in bit parts and as a stuntman. One of his earliest roles was in the 1922 George Melford-directed drama Moran of the Lady Letty, most notable for starring Rudolph Valentino. In 1924 O'Brien received his first starring role in the drama The Man Who Came Back opposite the English actress Dorothy Mackaill. That same year he was chosen by the famed movie director John Ford to star in The Iron Horse. The film was an immense success at the box-office and O'Brien made nine more films for Ford. In 1927 he starred in Sunrise opposite Janet Gaynor, which won three Academy Awards, was directed by F. W. Murnau, and remains widely considered by critics to be one of the finest and most powerful films ever made.

O'Brien would spend the remainder of the 1920s as an extremely popular leading man in films, often starring in action and adventure roles alongside such popular actresses of the era as Alma Rubens, Anita Stewart, Dolores Costello, Madge Bellamy, Olive Borden (with whom he was linked romantically during the 1920s) and Janet Gaynor.

O'Brien married the actress Marguerite Churchill on July 15, 1933 and the couple had a son, Darcy O'Brien in 1939 who would become a successful writer and a daughter, Orin O'Brien who would become a double bassist with the New York Philharmonic. A third child, Brian, died in infancy. The couple divorced in 1948.

With the advent of sound, George O'Brien became a popular star of Westerns and rarely took parts outside of the Western film genre. Throughout the 1930s, O'Brien was a consistent Top Ten box-office draw appearing in scores of Westerns, often atop his horse named Mike.

George's height was 5' 11" (1.80m).

During World War II, O'Brien re-enlisted in the United States Navy where he served as a beachmaster in the Pacific and was decorated several times. He left service with the rank of commander. He later joined the United States Naval Reserve and retired with the rank of captain in 1962, having four times been recommended for the rank of admiral . Following his service in World War II, O'Brien would occasionally take feature parts in films directed by his old friend and mentor John Ford including "Fort Apache," "She Wore A Yellow Ribbon" and "Cheyenne Autumn."

While serving in the Naval Reserve, O'Brien took on a project for the Department of Defense as part of President Eisenhower's "People to People" program. He was project officer for a series of orientation films on three Asian countries. One of these films, on Korea, was directed by his old friend, John Ford. The other two countries covered were Formosa (Taiwan) and the Philippines.

George O'Brien suffered a stroke in 1981 and was bedridden the last few years of his life. He died in 1985 in Broken Arrow, Oklahoma. For his contribution to the motion picture industry, George O'Brien was awarded a star on the Hollywood Walk of Fame at 6201 Hollywood Blvd., in Los Angeles, California.

George O'Brien (1821-1888) was an engineer of aristocratic background who turned to art in 19th century Australasia, dying in poverty but leaving a body of remarkable work.

George Hubert O'Brien (born September 16 1984 in Bermuda) is a Bermudian cricketer, who played with the Bermudian cricket team in their first ever One Day International when they played Canada on 17 May 2006; O'Brien took two wickets as Bermuda won the game by three wickets under the Duckworth/Lewis method. Three days later, O'Brien took two more wickets from Zimbabwe.

He has since gone on to represent Bermuda in four ODIs, but has been the subject of some controversy. His contract with the Bermuda Cricket Board was terminated in October due to a lack of motivation and commitment and a poor work ethic.

George O'Brien (born 22 November 1935, Dunfermline) is a former footballer, who has played for Southampton F.C.

During his career with the club, which lasted 6 years from 1959 to 1965, he scored 154 league goals (188 total goals)placing him 5th on the club's list of all-time goalscorers.

George was the son of the San Francisco Chief of Police who became a college athlete. He was the Heavyweight Boxing Champion of the Pacific Fleet during World War I. In the early 1920s, George wound up in Hollywood where he worked as a stuntman and part time actor. In 1924, Director John Ford (I) picked virtually unknown George to star in his first picture, Iron Horse, The (1924). Over the next two years, he would appear in four more Ford films and would co-star with Janet Gaynor (I) in Blue Eagle, The (1926) and Sunrise: A Song of Two Humans (1927). "Sunrise," a winner of two Academy Awards, was the story of a simple farmer who lets another woman talk him into murdering his wife. George remained popular until sound came along. By that time, his popularity was sliding, but he did make the transition to sound. With his rugged looks and physical size, he was soon a Western Cowboy Star. He was in some of the best stories ever written, Riders of the Purple Sage (1931), and in some of the worst. But he was consistently in the Top Ten money-making Western Stars. He would appear in a few films outside the horse set, such as Ever Since Eve (1934), but those roles would be few. By the end of the 1930s, George was still a popular 'B' movie Cowboy Star, but he would not take the parts as seriously as he did a decade before. During World War Two, he hung up his spurs, and he re-enlisted in the Navy where he fought in the Pacific and was decorated many times. After the war, when he would not find work in acting, John Ford (I), his old Director, would give him work with the cavalry in three of his films.

Handsome American leading man of classic silent films who became a different kind of star in B-Western talkies. The son of a policeman who later became police chief of San Francisco and then California Director of Penology, O'Brien was raised around police stables and quickly became adept at horsemanship. He was a star athlete in school and intended to study medicine, but with the advent of World War I, he joined the Navy and volunteered to serve as a stretcher-bearer with the Marines. Following his discharge, a chance encounter with Tom Mix led to a job as camera assistant with Mix's production company. This in turn led to small jobs as a prop man, extra, stuntman, and finally bit player. John Ford (I) spotted the husky young man and cast him in the lead role of his early Western Iron Horse, The (1924). He continued to work for Ford and became a popular leading man for a number of top-flight directors. With the coming of sound, he moved almost exclusively into Westerns and became a popular star of low-budget oaters. At the outbreak of World War II, O'Brien reenlisted in the Navy, served for a time as a recruit trainer, then participated in numerous island invasions in the Pacific Theater and was highly decorated. He played a few roles, particularly for Ford, after the war, but returned to naval duty in the Korean conflict and again during the Vietnam war. He left service with the rank of captain, having four times been recommended for the rank of admiral. He spent his later years ranching, but following a heart attack, was confined to bed for the last few years of his life. He died in 1985.