Won't Last a Day Without You is a 2011 Filipino romantic comedy film directed by Raz dela Torre from the screenplay he co-wrote with Melissa Mae Chua and Carmi G. Raymundo, based on a story by Chua. The film stars Sarah Geronimo and Gerald Anderson with the special participation of Joey de Leon.

Produced and released by Star Cinema and Viva Films, the film was theatrically released in the Philippines on November 30, 2011, and this was also the second team-up of Anderson and Geronimo on the silver screen after Catch Me, I'm in Love, released eight months prior on March 26, although Anderson remained in Budoy.