Roberto Alexander is a Mexican actor and director of dubbing, recognized for his extensive work in the Latin American Spanish voice-over industry. Born Roberto López Alexandre on May 8, 1941, in Morelia, Michoacán, Mexico, he is based in Los Angeles, California. Before entering the world of voice acting, Alexander was a singer. From the ages of ten to fourteen, he was a soloist with the renowned children's choir Los Niños Cantores de Morelia, performing at prestigious venues such as Carnegie Hall in New York and the Palacio de Bellas Artes in Mexico City. He later studied dramatic art at the Andrés Soler Academy of the National Association of Actors (ANDA) in Mexico City.

Alexander's career in dubbing began in Mexico, where he provided voices for television series. His first leading role in dubbing was for the character of Robert Blake in the series Baretta. He also dubbed characters in popular shows such as Rich Man, Poor Man and CHiPs. After a period of focusing on on-screen television and film roles, he relocated to Los Angeles, where he resumed and expanded his dubbing career, taking on both acting and directing responsibilities.

Throughout his prolific career, Alexander has lent his voice to a vast number of characters in anime and animated series, many of which are foundational to the Latin American dubbing industry. Among his most iconic and frequently cited roles is the voice of Cobra in the anime series Space Cobra. He is also widely known as the voice of Bumblebee in the original Transformers Generation 1 series and as Captain Future in the anime of the same name. In the long-running series Detective Conan, he provided the voice for Inspector Meguire, known in some dubs as Inspector Vera.

His work in the specific titles mentioned by the user is well-documented. In the Transformers franchise, he voiced the character Star Saber in the Japanese anime series Transformers: Victory. For the film Little Nemo: Adventures in Slumberland, he is credited as the voice of the character Oompe, as well as the Master of Etiquette. In the anime series Magnos the Robot, known in Spanish as Super Magnetron, he played the role of Waldo, one of the primary pilots of the titular robot. His filmography also includes voice work for The Adventures of the Little Prince, where he took on the roles of the Narrator, Swifty, and Piloto.

Beyond anime, Alexander's career spans a wide array of live-action dubbing for film and television. He has dubbed prominent actors such as Kurt Russell in Escape from New York, Danny DeVito in Ruthless People, Michael Biehn in Tombstone, and Luke Skywalker (Mark Hamill) in the original Latin American Spanish dubbing of Star Wars: Episode VI – Return of the Jedi. He has also provided voices for characters in series like Jem, Happy Days, Cheers, and The Untouchables.

In addition to his on-screen roles, Alexander has worked extensively as a voice director. He served as the voice director for the Latin American Spanish dubs of the original Transformers series and its associated movie, as well as for films such as Il Postino and numerous other projects. His contributions have made him a highly respected and recognizable figure in the world of Latin American dubbing, with a career spanning several decades and encompassing hundreds of roles across animation and live action.