The fourth season of La Casa de los Famosos México began on July 26 with Fede Vigevani as the undercover resident and a total of 18 participants.
During the premiere gala, Galilea Montijo introduced Fede Vigevani as the first undercover resident. His mission is to complete public-voted challenges to disrupt the house dynamics without being discovered.
Fede's first challenge was to hide the toilet paper, though Mariana Ochoa found it within hours. Three surprise residents also joined: Gema Garoa, Luis Chaparro and Mariana Ochoa.
Participants were divided into three rooms: Ibiza, captained by Aldo Rendón; Tulum, led by Karina Torres; and Malibú, headed by Fede Vigevani. Arantza Ruiz automatically nominated Aldo Rendón as the first nominee, while Cynthia Klitbo received immunity.