Big Brother Season 27 grabs double-digit viewership increase on CBS

In the United States, the reality television series 'Big Brother' launched its 27th season on July 10, 2025, attracting nearly 3 million viewers at its premiere. This figure represents a notable upswing of approximately 10 percent from the previous season’s debut episode, highlighting the show's sustained popularity. The season has introduced an array of new elements, including a surprise guest from a past season and the incorporation of a Mystery Houseguest, whose identity remains undisclosed. The cast is diverse, consisting of a professional bull rider, an event curator, a marketing manager, and other unique personalities, which contribute to the show's dynamic atmosphere. CBS has strategically positioned the program to capture a younger demographic, increasing its appeal among the 18-34 age group and adults 18-49. The increased viewership is also reflected in social media engagement, with '#BB27' trending substantially as fans eagerly followed the live feeds and episodes. Viewers can catch new content airing on Sundays and Thursdays, with extra extended versions on Wednesdays, as well as a special segment titled 'Big Brother: Unlocked' airing bi-weekly on Fridays. Fans are also anticipating the unveiling of the new live feeds, which were scheduled to commence the day after the premiere, on July 13.