Born in Abbiategrasso, he was only seven years old when in 1476 his father, Galeazzo Maria Sforza, was assassinated and he became the Duke of Milan.
Născut la Abbiategrasso, el avea numai șapte ani când în 1476 tatăl său, Galeazzo Maria Sforza, a fost asasinat, devenind astfel Duce de Milano.