| Big Brother: 'Til Death Do You Part | |
|---|---|
| Season 9 | |
&sq=Facebook&lang=en&file=File:Bb9_logo.png){kind=logo} Big Brother 9 logo | |
| Hosted by | Julie Chen |
| No. of days | 81 |
| No. of houseguests | 16 |
| Winner | Adam Jasinski |
| Runner-up | Ryan Quicksall |
| America's Favorite Juror | James Zinkand |
| Companion shows | |
| No. of episodes | 33 |
| Release | |
| Original network | CBS |
| Original release | February 12 – April 27, 2008 |
| Additional information | |
| Filming dates | February 7 – April 27, 2008 |
| Season chronology | |
Big Brother 9, also known as Big Brother: 'Til Death Do You Part, is the ninth season of the American reality television series Big Brother. It premiered on CBS on February 12, 2008, and concluded with its season finale on April 27, 2008; it was scheduled as a midseason installment of the series as replacement programming due to the Writers Guild of America strike.
The season's main twist saw the 16 HouseGuests being initially paired into couples with their "soulmate" (two of which being a pre-existing relationship); the couples partook in challenges, votes, and evictions together for the first three weeks of the competition, after which the HouseGuests competed as individuals for the remainder of the season as normal.
Big Brother 9 premiered to a total of 7.33 million viewers, the lowest premiere numbers for any season at the time. Overall, the series averaged 6.56 million viewers, making it the lowest rated season of the series at the time. The season ended after 81 days, in which HouseGuest Adam Jasinski was crowned the winner, and Ryan Quicksall the runner-up.