Belgium's King Filip and Queen Mathilde were in Rio de Janeiro on Sunday to watch the Red Devils record a 1-0 victory over Russia.
They were joined in their box by FIFA president Sepp Blatter and Belgium's defence minister, Pieter De Crem.
While Belgium were not at their best for much of the contest, the royals were able to enjoy Divock Origi's late winner, which saw Marc Wilmots' men make it two wins out of two.
As they were booked at the same hotel as the national team, the Rio Sheraton, the royal couple visited the players after the game to congratulate them on progressing to the second round. Many players seized the opportunity and took "selfies" with the King, who seemed relaxed and not at all reluctant.
The players also lined up and captain Vincent Kompany led the royals past them as they chatted with each one of them. Romelu Lukaku, who did not enjoy the best of games at the Maracana and was subbed after less than an hour, was surprised when Queen Mathilde congratulated him, saying: "It was your goal that won us the game, wasn't it?"
Lukaku saw the humour of it all and, smiling, pointed at Origi, saying: "No, no, he's over there."
The Queen praised the Chelsea striker's performance, however, and gave him a pat on the back.