Immaculada Villalonga is a Spanish voice actress known primarily for her work in animation dubbing, voice-over for television and film, and commercial advertising. She has over twenty five years of experience in the voice industry, working as both a voice actress and a dubbing director. Her professional training includes courses in dubbing under Montserrat Miralles, vocal technique with Cacu Prats, and acting with Carla Calparsolo. She has also worked as a script adapter for television and theatre and has taught courses on voice, dubbing, and interpretation.

Villalonga is most recognized by anime fans for providing the Spanish dub voice of Kyubey in the series Puella Magi Madoka Magica. Kyubey is a small, cat like creature who acts as a messenger of magic, capable of granting any wish to a chosen girl on the condition that she becomes a magical girl and fights witches. Despite its innocent appearance, the character is revealed to be the series main antagonist, an extraterrestrial being from a race known as the Incubators who manipulate magical girls to harvest energy and counteract entropy in the universe.

In addition to her anime role, her extensive voice career spans live action dubbing, documentary narration, corporate voice work, e learning content, and institutional advertising in both Spanish and Catalan. She has also worked as a presenter and speaker at cultural, sporting, and institutional events.