Alejandro Villeli is a Mexican actor with an extensive career in voice dubbing for animation and live-action media, recognized for his work in both anime and Western animated series. He was born on April 23, 1956, in Tilzapotla, Mexico, and moved to Mexico City in 1958 to pursue artistic training at the Estudio de Actores Dimitrio Sarrás, where he studied for five years. With more than 25 years of experience in dubbing, Villeli has also worked as a director and singer in addition to his voice acting roles.

In the realm of anime, Villeli is known for providing the Spanish voice for several villainous and veteran characters. He plays the role of Dr. Hell, the primary antagonist of the Mazinger franchise, appearing in productions such as the OVA Mazinkaiser and the film Mazinger Z: Infinity. He voices Abuelo Blas, the monster magician and adoptive grandfather of the protagonist, in the reboot of Dragon Quest: The Adventure of Dai. He is also widely recognized as the voice of Giovanni, the leader of Team Rocket, in the Pokémon anime franchise. Other notable anime roles include Teuchi in Naruto, Megatron in Beast Wars: Transformers, and various characters in the Ben 10 franchise, such as Donovan Grand Smith and Azmuth.

Beyond anime, Villeli's dubbing career encompasses a wide range of characters in animated series and live-action films. He is known for voicing the Groundskeeper Willie in The Simpsons for several seasons, Grandpa Lou Pickles in Rugrats and its spin-off All Grown Up!, and Kobayashi in the film The Usual Suspects. His work consistently features characters with rough or elderly qualities, a niche in which he remains active.