Sweden's Queen Silvia and her daughter Princess Madeleine enjoyed a very regal soiree on Thursday evening.
The ladies were joined by Saudi Arabia's stunning Princess Sora, who was on the arm of her husband, Prince Abdul-Aziz Al Saud.
Both are prominent members of the ruling Saudi dynasty, House of Saud.
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The meeting came as all four attended The Mentor Foundation USA International Gala in Washington.
The NGO works to prevent substance abuse amongst the world's youth. Prince Abdul-Aziz and Queen Silvia are both honorary members of the charity's board.
Madeleine, meanwhile, took advantage of her mother's working trip to the US.
The pretty princess has an exciting new life in New York after relocating there following her split from fiancé Jonas Bergstrom.
Once settled, she found love again with financier Chris O'Neill, and they now live together in a plush Manhattan apartment.
Chris has already been given the royal seal approval from his girlfriend's relatives.
Silvia often visits the couple in New York, and her husband King Carl Gustaf allowed the pair to attend the May christening of Princess Estelle in an official capacity.