Pinoy Big Brother: Double Up

Pinoy Big Brother: Double Up was the third regular season and the seventh series overall of Pinoy Big Brother, which began on October 4, 2009 on ABS-CBN. Toni Gonzaga, Mariel Rodriguez, and Bianca Gonzalez reprised their hosting duties this season. It ran for 133 days until February 13, 2010, which broke Season 2's record for the longest stay of housemates inside the house by only one week.

Melisa Cantiveros emerged as the winner of this season.