Dame Angela Brigid Lansbury (October 16, 1925 – October 11, 2022) was a British-American-Irish actress and singer. In a career spanning 80 years, she played various roles across film, stage, and television. Although based for much of her life in the United States, her work attracted international attention.

Lansbury was born into an upper-middle-class family in central London, the daughter of Irish actress Moyna Macgill and English politician Edgar Lansbury. To escape the Blitz, she moved to the United States in 1940, studying acting in New York City. Proceeding to Hollywood in 1942, she signed with Metro-Goldwyn-Mayer (MGM) and obtained her first film roles, in Gaslight (1944), National Velvet (1944), and The Picture of Dorian Gray (1945). She appeared in 11 further MGM films, mostly in minor roles, and after her contract ended in 1952, she began to supplement her cinematic work with theatrical appearances. Lansbury was largely seen as a B-list star during this period, but her role in The Manchurian Candidate (1962) received widespread acclaim and is frequently ranked as one of her best performances. Moving into musical theatre, Lansbury gained stardom for playing the leading role in the Broadway musical Mame (1966), winning her first Tony Award.

Amid difficulties in her personal life, Lansbury moved from California to Ireland's County Cork in 1970. She continued to make theatrical and cinematic appearances throughout that decade, including leading roles in the stage musicals Dear World, Gypsy, and Sweeney Todd, as well as in the Disney film Bedknobs and Broomsticks (1971). Moving into television in 1984, she achieved worldwide fame as the sleuth Jessica Fletcher in the American whodunit series Murder, She Wrote, which ran for twelve seasons until 1996, becoming one of the longest-running and most popular detective drama series in television history. Through Corymore Productions, a company that she co-owned with her husband Peter Shaw, Lansbury assumed ownership of the series and was its executive producer during its final four seasons. She also moved into voice work, contributing to animated films like Beauty and the Beast (1991) and Anastasia (1997). In the 21st century, she toured in several theatrical productions and appeared in family films such as Nanny McPhee (2005) and Mary Poppins Returns (2018).

Among Lansbury's accolades are six Tony Awards (including a Lifetime Achievement Award), six Golden Globe Awards, two honorary BAFTA Awards, a Laurence Olivier Award, an honorary SAG Award, and the Academy Honorary Award; in addition to nominations for three Academy Awards, eighteen Primetime Emmy Awards, and a Grammy Award. In 2014, she was made a dame by Queen Elizabeth II.

Angela Brigid Lansbury was born to an upper-middle-class family on October 16, 1925. Although her birthplace has often been given as Poplar, east London, she rejected this, stating that while she had ancestral connections to Poplar, she was born in Regent's Park, central London. Her mother was Belfast-born Irish Moyna Macgill (born Charlotte Lillian McIldowie), an actress who regularly appeared on stage in London's West End and who also appeared in several films. Her father was the wealthy English timber merchant and politician Edgar Lansbury, a member of the Communist Party of Great Britain and former mayor of the Metropolitan Borough of Poplar. Her paternal grandfather was the Labour Party leader George Lansbury, a man whom she felt "awed" by and considered "a giant in my youth". Angela had an older half-sister, Isolde, from Macgill's previous marriage to Reginald Denham. In January 1930, Macgill gave birth to twin boys, Bruce and Edgar, leading the Lansburys to move from their Poplar flat to a house in Mill Hill, north London; at weekends, they would stay at a farm in Berrick Salome, Oxfordshire.

I'm eternally grateful for the Irish side of me. That's where I got my sense of comedy and whimsy. As for the English half–that's my reserved side ... But put me onstage, and the Irish comes out. The combination makes a good mix for acting.

When Lansbury was nine, her father died from stomach cancer; she retreated into playing characters as a coping mechanism. Facing financial difficulty, her mother entered a relationship with a Scottish colonel, Leckie Forbes, and moved into his house in Hampstead. Lansbury then received an education at South Hampstead High School from 1934 until 1939, where she was a contemporary of Glynis Johns. She nevertheless considered herself largely self-educated, learning from books, theatre and cinema. Lansbury became a self-professed "complete movie maniac", visiting the cinema regularly. Keen on playing the piano, she briefly studied music at the Ritman School of Dancing, and in 1940 began studying acting at the Webber Douglas School of Singing and Dramatic Art in Kensington, west London, first appearing onstage as a lady-in-waiting in the school's production of Maxwell Anderson's Mary of Scotland.

That year, Lansbury's grandfather died, and with the onset of the Blitz, Macgill decided to take Angela, Bruce and Edgar to the United States; Isolde remained in Britain with her new husband, the actor Peter Ustinov. Macgill secured a job supervising 60 British children who were being evacuated to North America aboard the Duchess of Atholl, arriving with them in Montreal, Canada, in August 1940. Macgill then proceeded by train to New York City, where she was financially sponsored by a Wall Street businessman, Charles T. Smith, moving in with his family at their home at Mahopac, New York. Lansbury gained a scholarship from the American Theatre Wing to study at the Feagin School of Drama and Radio, where she appeared in performances of William Congreve's The Way of the World and Oscar Wilde's Lady Windermere's Fan. She graduated in March 1942, by which time the family had moved to an apartment on Morton Street, Greenwich Village.