Francisco Javier Dotú Sanjuan, born in Zaragoza, Spain in 1943, is a highly esteemed Spanish actor renowned for his extensive career in dubbing, as well as his work in theatre, television, and literature. His interest in the performing arts emerged early; he began appearing in small film roles as a child at the age of twelve and went on to study dramatic arts in Barcelona. He started dubbing foreign films in the mid-1960s and moved to Madrid in 1971, where his career in dubbing for television and film flourished. Over a career spanning more than six decades, he has lent his voice to thousands of dubbing projects.

Dotú is best known for being the established Spanish dubbing voice for several major international stars. He is the regular voice for Al Pacino, famously dubbing his role as Michael Corleone in The Godfather, and for Kevin Spacey, including his portrayal of Frank Underwood in House of Cards. He is also the habitual voice for actors such as Alan Alda, Kyle MacLachlan, and Dustin Hoffman, among many others. His extensive filmography includes dubbing for Jeff Bridges in Tron, Peter Sellers in Dr. Strangelove, and Willem Dafoe in American Psycho.

In addition to his work in live-action dubbing, Javier Dotú has a significant body of work in animation, which connects to the provided example. He is widely recognized for voicing Blas, the beloved yellow roommate of Epi, in the Spanish version of the children's program Sesame Street. His work in anime includes providing voices for the classic series Heidi, where he voiced characters such as the teacher, the Tutor, and Straal. He also lent his voice to other notable animated series, including D'Artacan y los tres mosqueperros as King Louis XIII and La vuelta al mundo de Willy Fog as the Caballero Naviero.

Beyond acting, Dotú has made significant contributions as a director and adapter of dubbing for numerous films, including Dances with Wolves, JFK, and American Psycho. He has also been a pioneer in teaching dubbing and voice-over techniques. In his later career, he has authored several books, most notably Historia del doblaje español, a comprehensive work on the history of dubbing in Spain. One of his most iconic and widely recognized roles is not for a specific character, but as the male voice of the Madrid Metro public address system, a position he has held for over two decades, making his voice a daily presence for millions of commuters.