William Bruce Mageean Lansbury (12 January 1930^[1] – 13 February 2017) was a British-American television producer, television writer and screenwriter. His career spanned over 30 years, from the 1960s to the 1990s, and included work on a number of American television series.

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Born in London England in 1930, Lansbury was the son of actress Moyna Macgill and Edgar Lansbury, an English politician and businessman, and grandson of future Labour Party leader George Lansbury. He was the younger brother of actress Angela Lansbury and the twin brother of theatre, film, and television producer Edgar Lansbury. Both brothers became United States citizens in 1954. Lansbury was a graduate of UCLA and married his first wife, Mary Hassalevris in 1951. The couple had two daughters and remained together until Mary's death in 1996. In 1998, he married Gail England.^[2]

Lansbury served as producer of 69 episodes of The Wild Wild West, from 1966 to 1969, and 38 episodes of Mission: Impossible, from 1969 to 1972, and among his work on other television series and TV movies, Lansbury served as producer of Wonder Woman, Knight Rider, Buck Rogers in the 25th Century and executive producer for the science fiction series The Fantastic Journey.^[3]

His name appears in the closing credits of The Brady Bunch, Happy Days and The Odd Couple as "Vice President of Creative Affairs" for Paramount Television.^[4]

Lansbury's most notable position was serving as producer of 88 episodes of Murder, She Wrote, starring his sister, Angela. He was also a writer for 15 episodes of the show.^[2]

Bruce Lansbury died on 13 February 2017, at the age of 87 in La Quinta, California, after battling Alzheimer's disease.^[3]