'Big Brother' is having a 25th anniversary special: Start time, channel, where to watch

CBS is celebrating a quarter of a century of the hit reality TV show "Big Brother".

Before the premiere of Season 25 in August, Entertainment Tonight’s Nischelle Turner will host a 25th anniversary special, airing Wednesday, July 26 at 9 p.m. ET.

The special will feature 24 seasons of archival footage from the ET vault. The teaser video hints at clips remembering everything from big fights to marriage proposals, and other groundbreaking moments in reality TV history. It will also include new exclusive interviews.

The special will take place on the set of "Big Brother" providing viewers with behind-the-scenes details and house secrets.

At the end of the special, viewers will get an exclusive sneak peek of the next season of "Big Brother", airing on August 2nd.

When does 'Big Brother' start?What to know about 2023 premiere, 25th anniversary special

Where to watch the 'Big Brother: 25th Anniversary Celebration'

You can watch the special on CBS Television Network Wednesday, July 26 at 9 p.m. ET. It will also be streaming and available on demand on Paramount+.

Who will be in the Big Brother special?

In addition to Nischelle Turner and Big Brother host Julie Chen Moonves, the special will feature a number of fan-favorite house guests.

Featured former winners include Cody Calafiore, Taylor Hale, Derrick Levasseur, Jordan Lloyd, Xavier Prather and Rachel Reilly.

Other houseguests making an appearance include Azah Awasum, Hannah Chaddha, Derek Frazier, Frankie Grande, Tiffany Mitchell, Janelle Pierzina, Danielle Reyes, Kaysar Ridha, Jeff Schroeder and Brendon Villegas.

When does the next season of 'Big Brother' air? Season 25 release date:

The 25th season of "Big Brother" premieres on Wednesday, August 2, at 8 p.m. ET. 

Viewers can expect weekly episodes on Sundays and Wednesdays 8:00-9:00 p.m. ET, and live episodes on Thursdays 9:00-10:00 p.m. ET.

While the exact number of episodes for season 25 has yet to be released, recent seasons spanned between 35-40 episodes.