Arthur Christopher Orme Plummer (December 13, 1929 – February 5, 2021) was a Canadian actor. His career spanned seven decades, gaining him recognition for his performances in film, stage, and television. He received multiple accolades, including an Academy Award, two Tony Awards, and two Primetime Emmy Awards, making him the only Canadian recipient of the "Triple Crown of Acting". He also received a BAFTA Award, a Golden Globe Award, and Screen Actors Guild Award as well as a nomination for a Grammy Award.

He made his Broadway debut in the 1954 play The Starcross Story. He received two Tony Awards, one for Best Actor in a Musical playing Cyrano de Bergerac in Cyrano (1974) and the other for Best Actor in a Play portraying John Barrymore in Barrymore (1997). His other Tony-nominated roles include in J.B. (1959), Othello (1982), No Man's Land (1994), King Lear (2004), and Inherit the Wind (2007).

After appearing on stage, he made his film debut in Stage Struck (1958), landed his first starring role that same year in Wind Across the Everglades. His breakthrough role was for his leading role as Captain Georg von Trapp in the musical film The Sound of Music (1965) alongside Julie Andrews. During this time he starred in The Fall of the Roman Empire (1964), Waterloo (1970), and The Man Who Would Be King (1975).

He received an Academy Award for Best Supporting Actor for Beginners (2011). Other Oscar-nominated roles include in The Last Station (2009) and All the Money in the World (2017). His other notable films include Somewhere in Time (1980), Malcolm X (1992), The Insider (1999), A Beautiful Mind (2001), The New World (2005), Syriana (2005), Inside Man (2006), The Girl with the Dragon Tattoo (2011), and Knives Out (2019).