Big Brother (Swedish TV series) season 9

Big Brother Sverige 2021 is the ninth and final season of the Swedish Big Brother.

The ninth season was announced by TV4 on 12 October 2020. It was also announced the season would start on 15 February 2021. This season was planned to run for 99 days. The prize for the winner is 1,000,000 kr.

On 27 January 2021, it was announced that Malin Stenbäck will return to present the live shows with Arantxa Alvarez. Also, the host duo will be accompanied by comedian Kirsty Armstrong; she would talk more about the events from inside the house. YouTuber Filip Dikmen will take part in the studio shows and give judgments and analyses about the housemates' behavior.

The premiere was held on Monday, 15 February 2021, on Sjuan. Weekly live shows are being shown on Mondays. New studio shows are broadcast from Tuesday to Thursday and classic Big Brother daily shows are shown from Friday to Sunday. There were live streams with multiple camera angles on C More, and there were the best clips continuously published on TV4 Play. Because viewers wanted more content of the house, a show named Bara Huset began airing on Thursday, 18 February 2021, as a test run. This show summarizes the best events from the past day.

For this season, the logo of the show remains the same as last season. The Big Brother house was slightly redecorated, with the confession room remaining the same.

The format of this season remains the same as the previous season. Housemates are allowed to talk about nominations if they want after that week's nominees were reported to the house.

On Thursday, 18 March 2021, one of the hosts, Malin Stenbäck, revealed during the studio show that this was her last show for this season. The reason is that she is also the host of Bachelor Sverige and Bachelorette Sverige, and the recording of these two shows will start soon and the schedule will collide with Big Brother. Arantxa Alvarez continued to host the show as usual.

Housemates
On Day 1, during the launch show, 10 housemates entered the Big Brother house. For the first time in Big Brother Sverige history, 2 additional housemates Jesper and Pontus did not enter the house. Instead, they had to live in a motorhome for a period of time. On Day 2 evening, after housemates completed the squirrel wheel task, Jesper and Pontus moved into the house as the award.

On the morning of Day 11, the first "Joker" of the season, Tanja, entered the house as a new housemate. On Day 13, the second "Joker", Adrian, entered the house.

On Day 22, a new audition started to search for new housemates.

On Day 26, Madelene entered the house. On Day 32, Alexander entered the house. On Day 39, Jaqueline entered the house. On Day 41, Dennis entered the house.

On Day 43, three returning players from the last season entered the house. They were Julia, Mergim and Victoria.