Prince William felt ‘inner pride’ to see Princess Kate back at his side for Trooping the Colour, an expert says.

Princess Kate and Prince William’s romantic moment on the balcony of Buckingham Palace has given royal fans a touching insight into their relationship. The Prince and Princess of Wales united for the palace appearance which marks the end of Trooping the Colour.

A special moment was caught on camera when William looks into the eyes of his wife, who made her triumphant return to official royal duties with an outing on Saturday (June 15) which sent royal fans into a frenzy.

Body language expert Judi James told MailOnline William’s eye-crinkling and the puckered muscles around his lips reveal his inner pride and “possible relief” to have Kate standing beside him again.

She said: “Kate, who had relaxed visibly by this stage, pinged back a wide, dimpled and very loving smile.”

Ms James told the same publication Kate’s return to the royal stage was a masterclass in royalty, adding that Kate had learnt from the late Queen by combining stoicism and calm with “not one drop of self-pity or drama”.

After months of chemotherapy, which is still ongoing, the princess joined a highlight of the royal calendar, but still kept a watchful eye on her children, Prince George, Princess Charlotte and Prince Louis, who together stole the show.

Her appearance had been in doubt after she missed the final Trooping rehearsal last weekend, but the spectacle of military pomp and pageantry became a symbolic statement by the monarchy after a period of uncertainty, with King Charles also undergoing treatment for cancer.