Big Brother's Season 21 premiere date has been announced by CBS.

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The network has announced Season 21 of Big Brother will return with a two-night premiere event on Tuesday, June 25 and Wednesday, June 26, with both episodes airing from 8-9PM ET/PT.

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Big Brother will continue to air three episodes every week this year.

Following the first two episodes of the new season, Big Brother will air a one-hour broadcast on Sunday, June 30 at 8PM ET/PT on CBS.

Beginning on Wednesday, July 10, the show will move to Wednesday and Thursday nights from 9-10PM ET/PT.

The Sunday night broadcast, however, will remain in its 8PM ET/PT timeslot once the schedule changes in July.

Big Brother will continue to be hosted by Julie Chen.

Big Brother follows a group of strangers living together in a house together that's outfitted with 94 HD cameras and more than 113 microphones, recording their every move 24 hours a day.

Each week, someone will be voted out of the house, and the last houseguest remaining will win the grand prize of $500,000.

Last season, Kaycee Clark was crowned champion of Big Brother, defeating runner-up Tyler Crispen in the jury vote.

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Big Brother is produced by Allison Grodner and Rich Meehan for Fly on the Wall Entertainment, in association with Endemol Shine North America.