The renewals were announced Wednesday at the Television Critics Association press tour at the Beverly Hilton in Beverly Hills, Calif.
“Big Brother’s” 19th and 20th seasons will air in summer 2017 and summer 2018, respectively. Julie Chen will be back as host for both seasons.
“Big Brother” is currently airing Sundays, Wednesdays and Thursdays on CBS, and has ranked as the most social TV show of the summer. Since premiering in 2000, the reality show has finished among the summer’s top-rated series in young demographics with all three weekly broadcasts ranking among the top five programs in adults 18-34 and the top 10 programs in adults 18-49 and 25-54.
CBS has also renewed another one of its summer hits, “Zoo,” which is based on James Patterson’s best-selling novel of the same name. The third season will air in summer 2017.
Currently in its second season, “Zoo” is this summer’s second most-watched original scripted TV show. The two-hour Season 2 finale airs Tuesday, Sept. 6 at 9 p.m.
In addition to the renewals, CBS also announced the premiere date for its upcoming unscripted JonBenét Ramsey docuseries “The Case of: JonBenét Ramsey.” The six-hour limited event will begin on Sunday, Sept. 18 at 8:30 p.m. ET and 8 p.m. PT.