Juan Carlos, Sofia and Elena of Spain in Spain on January 14th, 1964. [Getty Images]

SPAIN - JANUARY 14: Juan Carlos, Sofia and Elena of Spain in Spain on January 14th, 1964. (Photo by REPORTERS ASSOCIES/Gamma-Rapho via Getty Images) — see more

SPAIN - JANUARY 14: Juan Carlos, Sofia and Elena of Spain in Spain on January 14th, 1964. (Photo by REPORTERS ASSOCIES/Gamma-Rapho via Getty Images)

Gamma-Rapho REPORTERS ASSOCIES