He was born to Cesare and Paola Ranucci in Turin (he always regretted the fact that he was not born in Rome). It was in Turin where his parents, who were opera singers, were performing a show at the time Renato could really say that he was born in the back stage of the theater and that's where he spent all of his life. His father tried to make it up to him by having him baptized at Saint Peter's in Rome and apparently it worked because growing up in that neighborhood he ended up singing for the "white voices choir" of Saint Peter with the leadership of composer-conductor Lorenzo Perosi.