Glaiza de Castro (born January 21, 1988), is a Filipina actress, singer, host, composer and producer. After beginning her career in GMA in 2001, she transferred to its rival network, ABS-CBN, where she played mostly minor and supporting roles before returning to GMA in 2006.

In addition to her television appearances, she has also acted in a number of mainstream and independent films, including Sukob, Patikul, Batanes, and Still Life. She leads also in a top-rating primetime series called The Rich Man’s Daughter.

As a singer, De Castro has so far released four albums: Magbalik Ka, released in 2001, the self-titled Glaiza, released in 2006, Synthesis, released in 2015, and Magandang Simulain, released in 2017.