Big Brother 21 Two-Night Premiere Event Kicks Off June 25

Expect the unexpected as Julie Chen Moonves returns to host another epic season of the perennial summer favorite.

Spring has sprung, the days grow longer, and that means one thing: summer is coming, and with it, the one and only Big Brother Julie Chen Moonves will return to host Big Brother 21, which will make a splash with a two-night premiere event on Tuesday, June 25 and Wednesday, June 26 at 8/7c on CBS and CBS All Access Once again, Big Brother will air three episodes a week. Following the two-night premiere, the show will broadcast on Sunday, June 30 at 8/7c.Then, starting Wednesday, July 10, Big Brother will move to 9/8c on Wednesdays and Thursdays with the Sunday show remaining at 8/7c.Are you excited for another epic season of blindsides and backstabs? Julie sure is:Don't miss the two-night premiere of Big Brother 21 on Tuesday, June 25 and Wednesday, June 26 at 8/7c on CBS and CBS All Access