Kay Tagal Kang Hinintay (lit. 'How Long I've Been Waiting') is a 1998 Filipino romantic drama film directed by Rory B. Quintos from a story and screenplay by Mari L. Mariano, with additional screenplay credits going to Olivia M. Lamasan. It stars Judy Ann Santos and Rico Yan in the lead roles while supporting cast includes Gloria Sevilla, Dante Rivero, Jennifer Sevilla, and Bernard Palanca. The film's theme song "Kay Tagal" was sung by April Boy Regino from the words and music written by Andrei Dionisio, courtesy of Alpha Records. Yan and Santos were from Paano ang Puso Ko?, a year after it was released on February 12, 1997.

Produced and distributed by Star Cinema, the film was theatrically released on October 14, 1998. In 2022, the film was digitally restored and remastered in 4K resolution by ABS-CBN Film Restoration and Central Digital Lab.