Regina Ruiz, who performs under the professional name Regina Carrillo, is a Mexican voice actress. Her career in dubbing began when she was nine years old, working on Spanish-language voice productions for films, television series, and video games.

Her body of work includes a wide range of roles in animated films. Some of her notable movie credits include providing the voice for the young Elsa in the Mexican Spanish dub of Frozen, Bia in Rio 2, Jane in The Book of Life, and Marcie in The Peanuts Movie. She also voiced Lei Lei in Kung Fu Panda 3 and a young Hope van Dyne in Ant-Man and the Wasp. In the realm of television animation, she is recognized for voicing Manon in Miraculous: Tales of Ladybug and Oona in Puffin Rock.

Her work within the anime genre includes a prominent role in the series Wizard Barristers: Benmashi Cecil. In the Mexican Spanish dub of this series, she voiced the main protagonist, Cecil Sudo, a young and prodigiously talented magic lawyer. This production, which was released in 2023, featured a voice cast that included Mario Filio and was directed by Enrique Cervantes, marking a collaboration with other established figures in the Mexican dubbing industry. Her role in the series Junji Ito Maniac: Japanese Tales of the Macabre, as Mari, is another example of her contributions to the horror and anthology genre in anime. Her early career also included live-action television appearances in series such as El Chema and Señora Acero 5.