Back in the day, as everyone knows, kings would cement alliances through inter-marriage of their kin. These days, you don’t see that anymore (probably due in part to a lack of true monarchs) but are there any modern occurances of a ranking government official marrying an official from another government? Not to cement alliances but even the Brazilian Transportation Minister* falling madly in love with the Korean Secretary of Education*.
Only one I can think of is rather local to me. My congressman is married to a congresswoman from Guatemala. Any higher up the chain of command than that?
*Office names made up for example.