Big Brother Canada 9 is the ninth season of the Canadian reality television series Big Brother Canada. The series began filming on February 27, 2021 and premiered on March 3, 2021 on Global. Hosted by Arisa Cox, the show revolved around fourteen contestants (known as HouseGuests), who volunteered to reside in a house while being constantly filmed without any communication with the outside world as they compete to win a grand prize of CA$100,000.