Plummer was born on December 13, 1929 in Toronto, Ontario, the only child of Isabella Mary (née Abbott), who was secretary to the Dean of Sciences at McGill University, and John Orme Plummer, who sold stocks and securities [REF].
In 1946, his performance as Mr. Darcy in the production of Pride and Prejudice at Montreal High brought Christopher Plummer to the attention of Herbert Whittaker, the theatre critic of the Montreal Gazette.