"25 seasons of Big Brother, we're pulling out all the stops."

That's how "Big Brother" host, Julie Chen Moonves, previews the upcoming season of the hit CBS show in the "Big Brother" 25 Anniversary Special.

The season premieres on the heels of the recent "Big Brother 25th Anniversary Special," which teased exciting new games, house and cast for Season 25.

Moonves even hinted at some cameos from past stars. A video posted to the "Big Brother" Twitter, reveals legends Frankie Grande, Britney Haynes, and Danielle Reyes breaking into the "Big Brother" house and unleashing the season 25 twist.

The long-running reality series follows a group of people living together in a house rigged with cameras and microphones capturing their every move. At the end of each week, one person is voted out of the house, with the last remaining house guest receiving the grand prize of $750,000.

"I have no idea how many more years this is going to go on, but right now the way I'm feeling is that I hope it never ends," Moonves said in the special.

When does 'Big Brother' Season 25 start? Premiere date:

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

Where to watch 'Big Brother' 

"Big Brother" airs on CBS. It is also available to stream live and on-demand on the CBS app and Paramount+.

You can also watch previous episodes of "Big Brother" on Netflix.

What to expect from 'Big Brother' Season 25 house?

The 25th anniversary special showed us a special sneak peek of the new house. It's available to watch here.

Fans on the platform as X, formerly known as Twitter, have expressed mixed opinions about the new design.

'Big Brother' Season 25 episodes

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.

The show will move from Wednesdays to Tuesdays when "Survivor" and "Amazing Race" return this fall, CBS said in a news release.

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

'Big Brother' Season 25 cast

The show has not disclosed its cast yet, but noted all Season 25 contestants would be newcomers to the series.

Late start date amid writer's strike

Typically, "Big Brother" seasons start in June or early July, this year's August start date can be attributed to CBS planning for the writer's strike. According to the Hollywood Reporter, CBS pushed original content to later in the summer in case the Writers Guild of America strike disrupts production for scripted shows in the fall.