May Bayot-De Castro was a Filipino singer and stage actress best known for playing Elsa in Himala: Isang Musikal, the stage version of the 1982 film Himala, a role that won her the Aliw Award for Best Actress in a Musical. She returned to the musical in 2019 as Elsa’s mother, Nanay Saling. She was also a vocalist with the band Acoustic Jive. She died on 26 October 2026.

She was the daughter of the tenor Benjamin Bayot and the soprano Esperanza Bayot, and the older sister of the singer Lani Misalucha.