Castro 's first wife was Mirta Díaz-Balart , whom he married in October 1948 , and together they have a son , Fidel Ángel `` Fidelito '' Castro Díaz-Balart , born in September 1949 .
They married in October 1948 . They have a son , Fidel Ángel `` Fidelito '' Castro Díaz-Balart , born in September 1949 .