1921 in film

The top eight films released in 1921 by U.S. gross are as follows:

• January 21 – The silent comedy-drama The Kid, written by, produced by, directed by and starring Charlie Chaplin (in his Tramp character) – his first full-length film as a director – and featuring Jackie Coogan, is released in the United States. It is the year's second-highest-grossing film.
• March 6 – The silent epic war film The Four Horsemen of the Apocalypse, adapted for the screen by June Mathis, is released in the United States. It is the year's highest-grossing film (and the sixth-best-grossing silent film of all time), propels Rudolph Valentino to stardom and inspires a tango craze and a fashion for gaucho pants.
• August 29 – Broadway's first $1 million theatre, Loew's State opens.
• September 5 – Popular comedian Roscoe "Fatty" Arbuckle attends a party at the St. Francis Hotel, San Francisco, during which actress Virginia Rappe is fatally injured; although he is eventually acquitted of rape and manslaughter, the scandal derails his career.
• October 21 – George Melford's silent film The Sheik, which enhances leading actor Rudolph Valentino's international reputation as a Latin lover, is premiered in Los Angeles. Within the first year of its release, it exceeds $1 million in ticket sales.
• October 26 – The Chicago Theatre, which will be the oldest surviving French-style Baroque Revival grand movie palace, opens.
• The experimental short documentary film Manhatta is shot by painter Charles Sheeler and photographer Paul Strand in New York City.

United States unless stated

• Harold Lloyd (1913–1938)
• Charlie Chaplin (1914–1940)
• Lupino Lane (1915–1939)
• Buster Keaton (1917–1944)
• Laurel and Hardy (1921–1945)

• Aesop's Film Fables (1921–1934)
• Felix the Cat (1919–1936)
• Koko the Clown (1919–1963)

• January 3 – John Russell, actor (died 1991)
• January 27 – Donna Reed, actress (died 1986)
• January 31
  • Carol Channing, musical actress (died 2019)
  • Mario Lanza, singer, actor (died 1959)
• February 1- Peter Sallis, English Actor (died 2017)
• February 8 – Lana Turner, actress (died 1995)
• February 16 – Vera-Ellen, actress, dancer (died 1981)
• February 22 – Giulietta Masina, actress (died 1994)
• February 24 – Abe Vigoda, actor (died 2016)
• February 26 – Betty Hutton, actress (died 2007)
• March 3 – Diana Barrymore, actress (died 1960)
• March 4 – Joan Greenwood, actress (died 1987)
• March 10 - Charlotte Zucker, actress, mother of Jerry Zucker and David Zucker (died 2007)
• March 12 – Gordon MacRae, actor, singer (died 1986)
• March 25
  • Nancy Kelly, actress (died 1995)
  • Simone Signoret, actress (died 1985)
• March 26 – Julie Harris, costume designer (died 2015)
• March 28 – Dirk Bogarde, actor (died 1999)
• April 3 – Jan Sterling, actress (died 2004)
• April 10 – Chuck Connors, actor (died 1992)
• April 16 – Peter Ustinov, actor (died 2004)
• April 23 – Janet Blair, actress (died 2007)
• May 2 – Satyajit Ray, Indian filmmaker (died 1992)
• May 23 – Grigori Chukhrai, Ukrainian film director (died 2001)
• May 31 – Alida Valli, actress (died 2006)
• June 8 – Alexis Smith, actress (died 1993)
• June 19 – Louis Jourdan, actor (died 2015)
• June 21
  • Judy Holliday, born Judith Tuvim, actress (died 1965)
  • Jane Russell, actress (died 2011)
• July 3 – Susan Peters, actress (died 1952)
• July 6 – Nancy Reagan, born Anne Robbins, actress and First Lady of the United States (died 2016)
• July 17 – František Zvarík, Slovakian actor (died 2008)
• July 23 – Robert Brown, actor (died 2003)
• August 3 – Marilyn Maxwell, actress (died 1972)
• August 8 – Esther Williams, actress, swimmer (died 2013)
• August 19 – Gene Roddenberry, American screenwriter and producer (died 1991)
• September 8 – Harry Secombe, actor, singer (died 2001)
• September 27 – Miklós Jancsó, Hungarian director (died 2014)
• September 30 – Deborah Kerr, actress (died 2007)
• October 13 – Yves Montand, singer, actor (died 1991)
• November 3 – Charles Bronson, actor (died 2003)
• November 5 – Moritz Yomtov, screenwriter (died 1992)
• November 22 – Rodney Dangerfield, actor, comedian (died 2004)
• November 23 – Fred Buscaglione, Italian actor and singer (died 1960)
• December 4 – Deanna Durbin, actress (died 2013)
• December 24 - Liz Smith, English character actress (died 2016)
• December 26 – Steve Allen, actor, composer, comedian, author (died 2000)

• February 8 – George Formby Sr, 45, British music hall entertainer who appeared in one film (pulmonary tuberculosis)[11]
• May 17 – Karl Mantzius, 61, Danish actor, theatre director, writer
• June 5 – Georges Feydeau, 58, French playwright, many of whose plays were adapted for the screen (syphilis)[12]
• June 20 – George Loane Tucker, 49, American actor, screenwriter and director
• July 9 – Robert Broderick, 56, American stage and film actor [13]
• September 9 – Virginia Rappe, 26 American actress
• September 17 – Van Dyke Brooke, 62, American actor, screenwriter and film director

• Richard Arlen
• George Arliss
• Billie Dove
• Basil Rathbone
• Carole Lombard in A Perfect Crime (1921)
• Fredric March

• List of American films of 1921

Wikimedia Commons has media related to 1921 in film.