Last night, at the orangery in Warsaw's Łazienki Park, the princess ended her first day in Poland with a birthday party for the queen. Her dress was like a work of modern art, with a scribbled skirt. This bold design by Polish designer Goia Bazinga was certainly bolder than her usual office attire. The jagged black pleats contrasted playfully with the delicate black floral print at the waist. She accessorized with large pearl earrings and a matching necklace, creating a chic look without needing any extra colour to draw attention.

However, as the Duke and Duchess of Cambridge left their Polish residence for the garden party, they appeared to be in a rather unhappy mood. Middleton gave Prince William a stern look before stepping out, forcing a smile as she approached their car. Her mood was in stark contrast to the beaming smile she shared with the crowd outside the Polish presidential palace just hours earlier. While avoiding eye contact with her husband, the mother-of-three kept her head down, smiling weakly at the cameras. William looked eager to get into the car, his expression solemn.

At the Buckingham Palace party, Catherine appeared equally downcast, sitting at a table with a distant gaze. Some speculated that her sour mood stemmed from being overshadowed by the elegant Queen Letizia. Others thought her choice of tiara might have revealed deeper emotions, suggesting she was honouring Princess Diana by wearing her prized jewels. The iconic photograph of Diana in that tiara captures her youthful glamour, and with the important anniversary of Diana's death approaching, Catherine may have opted for a more subdued look as a tribute.

Earlier in the day, Wales received beautiful gifts from the Polish president and first lady, including a sword that the royal couple humorously noted they needed to keep away from George. In return, they were given a book about the London Palace and a photograph of themselves in gratitude for the warm welcome. Their final gift was a tea set from George III, and the royals couldn't resist a playful joke about being British, which added to the charm.

Catherine and William, who married in 2011, fulfilled a nation's dream of a royal fairytale. Seven years later, they are happily married with three beautiful children, despite their relationship having faced its fair share of challenges. They went through a trial separation, with Catherine reportedly upset when William went on a boat trip with his friend Guy, of whom she disapproved. While dealing with the split, Catherine returned to Berkshire over the summer, where she is said to have opened up to friends about her difficulties in the relationship.