His parents, Robert Keith and Helen Shipman, were married in 1919.
Like Brian himself, his stepmother Peg Entwistle also commit suicide. She jumped from the "H" of the famous Hollywood Sign in 1932.
He graduated from East Rockaway High School in East Rockaway, New York, in 1939.
Had a son, Michael, who died in 1963.
Shortly before future "Family Affair" (1966) co-star, Johnny Whitaker, co-starred with him, he appeared in the movie The Russians Are Coming the Russians Are Coming (1966), where Keith was so impressed by Johnny's acting that he invited him to co-star in Keith's new sitcom, the same year.
Was very disappointed when "Family Affair" (1966), was canceled at the end of the fifth season, because CBS began leaning towards more adult-oriented sitcom fare.
His father, Robert Keith, died on December 22, 1966.
Actors Kathy Garver and Johnny Whitaker were said to be huge fans of his when they were both growing up. They both co-starred alongside him on "Family Affair" (1966), and stayed on the show until its cancellation in 1971.
His future "Family Affair" (1966) co-star, Kathy Garver, had guest-starred with him twice: on an episode of one of his short-lived series, "Crusader" (1955), and just before his death, she worked with him on the aforementioned "Spider-Man" (1994) cartoon series.
Actor Daniel Hugh Kelly was said he to be a huge fan of his while he was growing up. His favorite movies that Keith starred were The Rare Breed (1966) and Nevada Smith (1966). Years later, he would land a co-starring role opposite Keith in "Hardcastle and McCormick" (1983), and stayed on the show until its cancellation in 1986.
Remained good friends with Johnny Whitaker and Kathy Garver, during and after "Family Affair" (1966).
Best remembered by the public for his starring role as Uncle Bill Davis on "Family Affair" (1966).
Was offered the role of Deke Thornton in The Wild Bunch (1969), but turned it down, because he was under contract working on "Family Affair" (1966).
His third wife Victoria Young co-starred with him on "The Brian Keith Show" (1972), she played a nurse.
Plays the role of a historical president of the United States in both of John Milius's films about Theodore Roosevelt. In The Wind and the Lion (1975) he co-starred as Roosevelt himself. In the prequel, Rough Riders (1997) (TV), he had a bit part as TR's predecessor, William McKinley (at a time when Roosevelt was President McKinley's Assistant Secretary of the Navy).
His mother, Helena Shipman, died on October 26, 1983.
His widow Victoria Young guest-starred with him on 2 episodes of "Hardcastle and McCormick" (1983).
Beat out three other actors for the role of the title character in "Hardcastle and McCormick" (1983).
Remained friends with Daniel Hugh Kelly during and after "Hardcastle and McCormick" (1983).
Had enjoyed playing his role on "Hardcastle and McCormick" (1983).
Suffered an eye injury on the set of "Hardcastle and McCormick" (1983). .
Was a heavy smoker until 1986, just the decade before he was diagnosed with lung cancer.
His daughter Daisy Keith co-starred with him on his final show "Heartland" (1989).
Professional Firefighter with the Knoxville Fire Department 1997-2007.
He was awarded a Star on the Hollywood Walk of Fame for Television at 7021 Hollywood Boulevard in Hollywood, California.