Beto Castillo is a Mexican voice actor, singer, and director known for his extensive work in Latin American Spanish dubbing for anime, animated series, and live-action films. He is a graduate of the Tecnológico de Monterrey with a degree in Communication Sciences.

Castillo's voice can be heard in a wide range of anime productions. He voices the character Desha in the series Ranking of Kings and Mamoru Yotsuya in Mieruko-chan. He is the voice of the Pokémon Dada Zarude in the film Pokémon the Movie: Secrets of the Jungle. Other notable roles include Megumi Kitaniji in The World Ends with You the Animation and Drago in Bakugan Battle Planet. His filmography also includes roles in popular series such as Frieren: Beyond Journey's End, My Hero Academia, Record of Ragnarok as the narrator, and Re:ZERO -Starting Life in Another World- as Kadomon Risch.

Beyond acting, Castillo frequently contributes in other capacities, serving as a music director, musical adapter, and singer for various projects. For instance, he worked as the music director for the Mexican dub of films like Mazinger Z: Infinity and The Quintessential Quintuplets the Movie, and provided singing for the Latin Spanish dub of Soreike! Anpanman: Inochi no Hoshi no Dolly. He has a background as a vocal coach and arranger, having worked on television programs such as La Academia. In addition to his anime work, Castillo is widely recognized in Mexico for dubbing high-profile characters in live-action and animated films, including Maui in Moana: Un mar de aventuras, Doctor Strange in the Marvel Cinematic Universe, and Luke Skywalker in the recent Star Wars trilogy.