Sergio Olmo is a Spanish voice actor known for his work in dubbing animated series and films, particularly in the realm of anime, for Spanish and Catalan language versions. He is professionally active and specializes in young voice types.

His filmography includes a wide array of prominent anime roles. He voiced the character of El Drac, also known as Kei, in the film Belle, providing the voice for both the Spanish and Catalan dubs. In the Star Wars: Visions anthology series, he took on the roles of Asu in the short The Village Bride and the droid B-20N in the short The Twins. Other significant anime credits include Jinho Yoo in Solo Leveling, Akira Tendo in Zom 100: Bucket List of the Dead, and Hyoga in Dr. Stone: Stone Wars. He has also voiced Koshi Sugawara across multiple installments of the Haikyu!! franchise and Shoto Todoroki in several My Hero Academia films, including Two Heroes, Heroes: Rising, World Heroes' Mission, and You're Next. His work also extends to long-running series, having provided the Catalan voice for Konohamaru Sarutobi in Naruto and Boruto: Naruto the Movie.

Beyond anime, Olmo's dubbing work encompasses a variety of live-action and animated productions. He is the Spanish voice for Miles Morales in the film Spider-Man: Across the Spider-Verse and its variant Miles G. Morales / Prowler. Additional credits include the role of Casey in the second season of the series Loki, Trevor Spengler in Ghostbusters: Frozen Empire, and Prince Jacaerys Velaryon in the first season of House of the Dragon. His work demonstrates a recurring presence in dubbing projects for major franchises across different media.