Julia Martínez is a Spanish voice actress known for her work in dubbing anime and animated series into Spanish for audiences in Spain. She has built a career voicing a wide array of characters across various genres, from long-running fantasy series to recent Netflix productions.

Her body of work includes several prominent roles. She is the Spanish voice of Alice Gehabich in the anime series Bakugan Battle Brawlers and its sequel, Bakugan Battle Brawlers: New Vestroia. She also voiced the character Agatha in the 2018 vampire action anime Sirius the Jaeger. In the animated series Pacific Rim: The Black, she provided the voice for Loa.

Martínez's career extends to other high-profile titles. She voiced the character Abu in the 2024 film Blue Lock: The Movie - Episode Nagi. Her recent work also includes roles in the Spanish dubs of major streaming series, such as Seiko Ayase in the 2024 adaptation of Dan Da Dan and a young Aki Hayakawa in the 2022 series Chainsaw Man. In addition to these, her extensive filmography includes roles in series like Shinzo, Dinosaur King, and its second season.

Throughout her career, Martínez has frequently collaborated with other Spanish voice actors. Notably, she has worked alongside Jaime Roca, another established figure in Spanish dubbing, to whom she is married. Their collaborations can be seen in series such as Bakugan Battle Brawlers, where Roca voiced the main character Dan Kuso, and Sirius the Jaeger, where he voiced Hideomi Iba.