Pinoy Big Brother, more popularly known by its abbreviated title PBB, is the Philippine version of the Big Brother reality game show franchise. The word Pinoy in the title is a colloquial term for the Filipino people. Is a Philippine television reality show broadcast by ABS-CBN, Studio 23 (now S+A) and its international channel, TFC in various countries worldwide. Originally hosted by Willie Revillame, Toni Gonzaga and Mariel Rodriguez, it premiered on August 21, 2005. The uncut 24/7 version of the series can also be seen on the internet through Kumu, a Philippine online livestreaming app, as part of their partnership on the current season, as carried over from the previous season. Kumunity Season 10, the recently concluded season, was hosted by Bianca Gonzalez and Robi Domingo.

Other essential elements of the Big Brother franchise are present, such as weekly and daily challenges, the confession room, and the voice known only as "Big Brother," sometimes referred to as "Kuya" (Tagalog for an elder male sibling). Pinoy Big Brother uses their tagline "Teleserye ng Totoong Buhay" or the "Real Life Soap Opera".