PICTURED: Glittering Kate Middleton arrives for State Banquet in Princess Diana’s tiara

The Duke and Duchess of Cambridge were pictured arriving for a state banquet in honour of the King and Queen of the Netherlands

Kate Middleton thrilled royal fans as she was seen wearing Princess Diana’s tiara while on her way to a state dinner.

The Duke and Duchess of Cambridge were photographed in a car in their full regalia as they made their way to the event.

Royal fans believe her necklace is Queen Alexandra’s Wedding Parure, which was a gift from Albert Edward, Prince of Wales, ahead of their wedding in 1863.

Queen Alexandra’s wedding set included a large diamond tiara plus a diamond and pearl necklace, set of earrings, and brooch.

The tiara, popularly known as the “Rundell” Tiara, no longer exists the remaining jewels were split between royal ladies for a time but are now reunited in The Queen’s collection.

Kate opted to pair the necklace with Princess Diana’s Cambridge Lover’s Knot tiara and the Princess of Wales’ Collingwood Pearl Drop Earrings

The Lover’s Knot tiara was given to Diana as a wedding present.

Her opulent jewels accentuated her kingfisher blue gown by Alexander McQueen.

The dinner is being held in honour of the King and Queen of the Netherlands who are making a state visit to the UK.

King Willem-Alexander and Queen Maxima arrived today and are staying with the Queen at Buckingham Palace for two days.

Queen Maxima looked stunning in an ethereal dark green gown and the diamond Stuart Tiara.

The couple, who wed in 2002, and have have three daughters, Princesses Catharina-Amalia, Alexia and Ariane.

The 51-year-old monarch and his family live at Villa Eikenhorst in the forested De Horsten estate in Wassenaar near The Hague, a former royal hunting ground which covers around 400 acres.