Olga Velasco is a Spanish actress primarily known for her extensive work in dubbing, providing the Spanish voice for numerous characters in animation, live-action series, and films. Born in Madrid on April 24, 1974, she began her career in dramatic arts and theater before discovering the world of dubbing. She trained at the Escuela de Salvador Arias in Madrid to hone her craft.

Velasco has built a prolific career voicing a wide array of characters in anime and animated series for the Spanish market. She is notably the regular Spanish dub voice for actress Emily Blunt, among others. Her work in the Pokémon franchise is particularly extensive, including the role of Venus in Pokémon: The Arceus Chronicles, Alice in Pokémon: The Rise of Darkrai, as well as characters like Gerania in Pokémon: Black and White, Samina in Pokémon Sun & Moon, and Kidd Summers in Pokémon: Lucario and the Mystery of Mew. Other prominent anime roles include Hannah in the series Dragon's Dogma, Orika in Over The Sky, and Misato Katsuragi in the Netflix Spanish dub of Neon Genesis Evangelion and its associated films. She has also voiced major characters in long-running series such as Hilary Tachibana in Beyblade: V-Force, Anko Mitarashi, Kurenai Yuhi, and Tenten in Naruto, and Crystal in Carole & Tuesday.

Beyond anime, Velasco is widely recognized for her voice work in other prominent animated series, most notably as the voice of Candace Flynn in the Disney Channel series Phineas and Ferb. She has also lent her voice to characters in live-action productions, such as Bulma in the Spanish dub of the film Dragonball: Evolution.

Throughout her career, Velasco has frequently collaborated with a consistent group of voice actors in the Madrid dubbing industry. According to dubbing database records, she has worked most often with actor Luis Bajo, accumulating fourteen team-ups across various projects. Other frequent collaborators include Juan Amador Pulido, Roberto Encinas, Pedro Tena, and David Robles, among many others.

Velasco's notable achievements include being the regular Spanish voice for several high-profile international actresses. Her work has earned her recognition within the Spanish dubbing community, leading to interviews where she has discussed her craft and career. She has voiced the Spanish Gamora in the Marvel Cinematic Universe's Guardians of the Galaxy films. Known for her professionalism and humility, she has expressed that her goal is to faithfully follow the original performance rather than create her own version, allowing the audience to forget they are listening to a dubbed track.