Pinoy Big Brother: Double Up is the third regular season of Pinoy Big Brother, which began on October 4, 2009 on ABS-CBN . Toni Gonzaga, Mariel Rodriguez, and Bianca Gonzalez reprise their hosting duties this season.
There were two sets of auditions for this season. The first set of auditions were held in late 2007 in several key cities in the Philippines, as well as the cities of Madrid, Milan, and Dubai.
Those auditions also produced the housemates for Pinoy Big Brother: Teen Edition Plus.
The second set of auditions for this season, as well as for the third Teen Edition, were held in several key cities in the Philippines and the cities of Tokyo and San Francisco.
This brought the number of auditioners to 57,824. From those two sets of auditions, it was reported that fifty people were chosen for shortlist.
Fourteen entered the House, with more possibly to come.
Unlike previous seasons, the house has been divided into two distinct areas with similar rooms and a shared confession room, but both are designed differently - with House A inspired by the architectural design of Antoni Gaudí, and House B featuring reproductions of Vincent van Gogh's paintings.
The housemates also include two sets of identical twins - with each member of the twins living in both parts of the house, switching between the two areas when instructed.
However, the rest of the housemates do not know about the twins, or the fact that there are two houses.
The twins will also receive an immunity from nomination for eviction during the first nomination night if they succeed in keeping this a secret, but if they do reveal it they will be forcibly evicted.
The winner of the new season would receive an LCD TV set, an Asian tour package, a business package, a house and lot, and one million pesos.
The winner would also donate a million pesos to a charity of their choice, making Double Up the first non-celebrity season to do so.
This season also marks the return of Pinoy Big Brother UpLate, after being replaced by Pinoy Big Brother Über in the second Celebrity Edition and Pinoy Big Brother: Teen Edition Plus.
Mariel would continue to host Über while Bianca would take the helm for UpLate.