The Australian-born royal, 52, was spotted greeting wellwishers in a beautiful dropped-hem skirt from Joseph which came in a beige linen and cotton mix fabric.
The waist-cinching number was teamed with the 'Brooket' shirt from Bagutta - a classic fitted style with rolled sleeves and an open collar neckline for a casual twist.
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The mother of four was seen styling her neutral ensemble with the unusual 'Amita 45 Smoky Blue Fishnet Mesh and Nappa Slingback Pumps' from Jimmy Choo for a high-end touch and added a touch of yacht chic with the 'Malibu' hat from Canopy Bay which was made in Australia.
As always, jewellery was key in elevating Mary's look. She opted for pearl drop earrings, layered gold bracelets, and separate necklaces with 'M' and 'F' initials - all from Dulong.
The royal's hair was worn in loose curls and her makeup look featured a pink lip with a satin finish. The couple looked so in love as they beamed at each other during a stroll around Voderup Klint.
Queen Mary's summer tour-drobe
Later that evening, King Frederik's wife attended a reception on the island of Ærø in a beautiful floral printed dress from Etro with a V neckline and long sleeves. The piece was styled with a low chignon and drop earrings with a stunning blue stone.
Meanwhile, the day before Mary and Frederik headed to Bornholm where the Queen was seen greeting Danish children in another white shirt, this time styled with wide-leg trousers in a deep burnt orange colour and the 'Stand Up Collar Blazer' from Harris Wharf.
Rounding off her look was another pair of designer shoes - the 'Rope And White Canvas Cap Toe Ballet Flats' from Prada.
Another evening look of her tour was worn to a reception the couple hosted to mark their landing in Bornholm. Mary looked radiant in a pale pink dress from ArtFusion with a bird print which was belted and styled with Dulong bracelets.
It was a certain daytime look that had royal followers questioning Mary's fail-safe style. On Tuesday, she wore the unexpectedly long 'Navy Breton Striped Tweed Sleeveless Cardigan Long Jacket' from Weill.
Mary also wore a hat from Jane Taylor with folds of fabric coming out from behind each ear. "The vest is too long and too shapeless. Separately, all these garments look fine, but together they look messy. For me, it’s a rare mistake!" penned one royal fashion follower on Instagram.
A second added: "I love this outfit - not 100% sure on the hat though, which is unusual for me as I think Mary’s style is usually impeccable."
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