| Big Brother | |
|---|---|
| Season 21 | |
| Hosted by | Julie Chen Moonves |
| No. of days | 99 |
| No. of houseguests | 16 |
| Winner | Jackson Michie |
| Runner-up | Holly Allen |
| America's Favorite HouseGuest | Nicole Anthony |
| Companion show | Big Brother: After Dark |
| No. of episodes | 40 |
| Release | |
| Original network | CBS |
| Original release | June 25 – September 25, 2019 |
| Additional information | |
| Filming dates | June 19[1] – September 25, 2019 |
| Season chronology | |
Big Brother 21 is the twenty-first season of the American version of the television reality program Big Brother. The season premiered on June 25, 2019 and concluded on September 25, 2019. The 40-episode season was broadcast on CBS in the United States and Global in Canada. The show chronicles a group of contestants, known as HouseGuests, as they compete to be the last competitor remaining to win a grand prize of $500,000.
Over the course of the season, the HouseGuests participated in a series of competitions to win power and safety to avoid being eliminated, referred to as "evicted". In the finale episode, previous nine evicted HouseGuests, known as the Jury, voted on who they thought should win the game out of the last two HouseGuests remaining. The HouseGuest who received the most votes would be declared the winner. Prior to the live finale, a public vote is held to determine who would win the title America's Favorite HouseGuest and a prize of $25,000. Jackson Michie was declared the winner of the season in a 6–3 jury vote over Holly Allen while Nicole Anthony won the public vote for America's Favorite HouseGuest.
Despite receiving negative reviews from fans and critics, on September 5, 2019, CBS confirmed that the series was renewed for a twenty-second season.