Season 0 of Big Brother premiered on June 21, 2006.

Various Specials Shown Before A Season of Big Brother Starts.

Season 1 of Big Brother premiered on July 5, 2000.

Big Brother 2000 was a near-exact port of the hit Netherlands (Holland) series of the same name. Every week, Housemates would nominate two fellow housemates and the two or more housemates with the most nominations were eligible for banishment. American viewers could then call a 1-900 number and cast a vote to banish a HouseGuest.

Season 2 of Big Brother premiered on July 5, 2001.

This season brings a complete reformatting of Big Brother 1. The introduction of the Head of Household (HOH). The HOH would then nominate two houseguests for eviction. The fellow contestants would vote, and the player with the most votes would be evicted. On finale night, all former houseguests returned to vote for who they thought should win the grand prize.

Season 3 of Big Brother premiered on July 10, 2002.

Twelve houseguests enter the house in a chance to win $500,000. This season brought about more changes to the Big Brother format - the introduction of the Silver and Golden Power of Vetos.

Season 4 of Big Brother premiered on July 8, 2003.

In a season twist, ten of the thirteen houseguests are shocked to learn that they will competing alongside their exes. In addition, there brings the introduction of the Diamond Power of Veto and the sequestered Jury.

Season 5 of Big Brother premiered on July 6, 2004.

Fourteen houseguests enter the house for a chance to win $500,000. In the seasons twists, there are two sets of pre-existing relationships in the house - secret twins and long lost siblings.

Season 6 of Big Brother premiered on July 7, 2005.

Fourteen houseguests enter the house for a chance to win $500,000. In the season twist, every houseguest entered the house with a secret partner - believing they were the only pair. If both can reach the end, the winner would receive a grand prize of $1,000,000 and the runner-up, $250,000.

Season 7 of Big Brother premiered on July 5, 2006.

Fourteen of the best and most iconic Big Brothers houseguests make their return to compete for the $500,000 grand prize.

Season 8 of Big Brother premiered on July 4, 2007.

Fourteen houseguests enter the house for a chance to win $500,000. In the seasons twists, 3 houseguests are shocked to learn their "enemy" will be entering the game - ex best friends, ex boyfriends, and an estranged father and daughter.

Season 9 of Big Brother premiered on February 11, 2008.

Sixteen houseguests enter the house for a chance to win $500,000. In the seasons twist, every houseguest would compete, be nominated, and be evicted as couples.

Season 10 of Big Brother premiered on July 12, 2008.

Thirteen houseguests enter the house for a chance to win $500,000.

Season 11 of Big Brother premiered on July 8, 2009.

Thirteen houseguests enter the house for a chance to win $500,000.

Season 12 of Big Brother premiered on July 7, 2010.

Thirteen houseguests enter the house for a chance to win $500,000.

Season 13 of Big Brother premiered on July 6, 2011.

Thirteen houseguests enter the house for a chance to win $500,000. In the twist of the summer, three Dynamic Duos of iconic previous houseguests make their return for another chance to win - Dick and Daniele, Jordan and Jeff, Rachel and Brendon.

Season 14 of Big Brother premiered on July 11, 2012.

Sixteen houseguests enter the house for a chance to win $500,000. In the season's twist, four previous houseguests return as Coaches to build a Big Brother dream team - a $100,000 prize awaits the coach who picks the Big Brother winner.

Season 15 of Big Brother premiered on June 25, 2013.

Sixteen houseguests enter the house for a chance to win $500,000.

Season 16 of Big Brother premiered on June 24, 2014.

Sixteen houseguests enter the house for a chance to win $500,000. This season's twist brings about the Battle of Block - two HOHs, 4 nominations, and the chance of an HOH being evicted.

Season 17 of Big Brother premiered on June 24, 2015.

Seventeen houseguests enter the house for a chance to win $500,000. This season brings back the iconic Twin Twist with two sisters swapping out every few days, unbeknownist to the other houseguests. The Battle of the Block makes it return.

Season 18 of Big Brother premiered on June 21, 2016.

Sixteen houseguests enter the house for a chance to win $500,000. In the season's twist, four previous houseguests make their return for a chance at the prize.

Season 19 of Big Brother premiered on June 28, 2017.

Season 19's new twist is called “Summer of Temptation,” where the Houseguests will be challenged like never before as they embark on a season of tempting offers that could give them money, power and safety in the game. But, they will need to be careful, because for every temptation taken, there will be a consequence to face. This season's house reflects the temptation twist with words like Money and Revenge hanging on the wall, constantly reminding the Houseguests that the game never stops.

Season 20 of Big Brother premiered on June 26, 2018.

Sixteen houseguests enter the house for a chance to win $500,000.

Season 21 of Big Brother premiered on June 25, 2019.

Sixteen houseguests enter the house for a chance to win $500,000.

Season 22 of Big Brother premiered on August 4, 2020.

Sixteen houseguests consisting of the best and most iconic houseguests make their return to compete for the $500,000 prize.

Season 23 of Big Brother premiered on July 7, 2021.

Sixteen houseguests enter the house for a chance to win the new grand prize of $750,000.

Season 24 of Big Brother premiered on July 6, 2022.

Sixteen houseguests enter the house for a chance to win the grand prize of $750,000.

Season 25 of Big Brother premiered on August 2, 2023.

Seventeen houseguests enter the house for a chance to win the grand prize of $750,000.

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