Paul Jake Castillo

The third season of the reality game show Pinoy Big Brother, subtitled "Double Up" premiered on the ABS-CBN network on October 4, 2009 and ran for 133 days until February 13, 2010.

This is the third civilian season and the seventh season overall to air on the network. This season broke the previous civilian season's record for the longest stay of housemates inside the house by only one week.

After 133 days, Melisa Cantiveros emerged as the winner of this season. Paul Jake Castillo was the runner-up, while Jason Francisco, Johan Santos, and Steve "Tibo" Jumalon were the finalists.