King Frederik and Queen Mary wowed as they hosted Iceland's President Halla Tómasdóttir and her husband Björn Skúlason at a glittering gala diner at Christiansborg Palace on Tuesday night.
The Danish royal couple hosted their first incoming state visit since Frederik's reign began in January.
It comes just days after Queen Mary, 52, returned from a four-day official visit to Brazil, where the focus was on biodiversity, health and the fight against violence against women.
Recommended videoYou may also likeWATCH: Queen Mary explores the Amazon on solo trip to Brazil
Frederik, 56, donned military uniform while Mary dazzled in a sequined midnight blue gown by Jesper Høvring and the Pearl Poire tiara, which she debuted back in May on her outgoing state visit to Norway.
Queen Mary sported the Pearl Poire tiara, which she debuted on the state visit to Norway in May.
She wore it with the Antique Diamond Parure and earrings - a collection of jewels that became synonymous with Queen Margrethe during her 52-year reign.
The diamond and pearl tiara was commissioned as a wedding gift from King Frederich Wilhelm III of Prussia to his daughter, Princess Louise, upon her marriage to Prince Frederick of the Netherlands in 1825.
The jewels were then inherited by Princess Louise's daughter, Queen Louise of Sweden and Sweden, and then later, left to her daughter, Louise, who was Queen of Denmark from 1906 to 1912.
Joining the couple on the night was Frederik's aunt, Princess Benedikte, who looked elegant in a lavender gown and the Sayn-Wittgenstein-Berleburg Fringe tiara.
Guests dined on a delicious three-course meal, which included North Sea cod with pickled beets for starters, chicken ballotine from Gråsten with a variety of root vegetables from Fredensborg Castle garden as the main course, and yogurt Bavarois with apricots for dessert.
In his address, Frederik paid tribute to Denmark's close connection with Iceland, saying: "Both Icelanders and Danes, like the rest of the Nordic countries, live in solid democratic societies.
"We are surrounded by the same values, are concerned with similar objectives and like to lead the way when it comes to solutions to national and global challenges.
"For the same reason, we take great pleasure in leaning in and leaning on each other when we take new steps that will bring us greener, healthier and safer into the future."
The day began with the royal couple welcoming the President and her husband at Nordre Toldbod in Copenhagen, where they arrived by boat. This was followed by a wreath-laying ceremony and an official reception at Amalienborg.
The royal couple and the presidential couple then visited Jónshús, an Icelandic cultural centre in the city centre before heading to the Folketing (Danish Parliament), and then viewing the Arnamagnæanske Samling (manuscripts that date back to the Middle Ages) at the University of Copenhagen.
The Danish queen rewore her purple coat dress from King Charles's coronation, which was made by Danish designer Søren Le Schmidt.
She wore her brunette locks in loose waves, accessorising with a matching headband.
LISTEN: Why King Charles shared Beatrice's baby news
ROYAL FAN? JOIN THE CLUB
Welcome to The HELLO! Royal Club, where thousands of royal fans like you get to delve deeper into the wonderful world of royalty every day. Want to join them? Just click the button below for a list of club benefits and joining information.
Sign up to HELLO! Daily for all the latest and best royal coverage
By entering your details, you are agreeing to HELLO! Magazine User Data Protection Policy. You can unsubscribe at any time. For more information please click here.