Jorge Sanz was born on August 26, 1969 in Madrid.

The son of a military man, he is the youngest of five siblings and probably would have followed a military career following in his father's footsteps, but his mother took him to an audition when he was nine years old and he was cast as Jane Birkin's son in the film La Miel (1979) directed by Pedro Masó, beginning a prolific career as a child actor mostly in commercial films such as Conan the Barbarian (1982), alongside Arnold Schwarzenegger.