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. His accolades included 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.

Plummer 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).

Plummer made his film debut in Stage Struck (1958), landed his first starring role that same year in Wind Across the Everglades. He became a household name as a result of his 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).

Plummer received an Academy Award for Best Supporting Actor for Beginners (2011); he was nominated for the same award for his performances in The Last Station (2009) and All the Money in the World (2017). His other notable films include The Return of the Pink Panther (1975), Somewhere in Time (1980), The Man Who Planted Trees (1987), 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).