A proud Prince George looked very smart as he arrived at Westminster Abbey to carry out a key role at grandfather King Charles' Coronation.
The future king joined the seven other boys who have been picked to be pages of honour for the King and Queen Camilla and wore a traditional red military-style uniform.
The boys have been given the prestigious job of carrying both Charles and Camilla's robes with George helping his grandfather in the procession.
Joining him attending to the King are Lord Oliver Cholmondeley, Ralph Tollemache and Nicholas Barclay.
Camilla's pages are her grandsons Freddy Parker Bowles, Louis Lopes and Gus Lopes as well as her great nephew Arthur Elliot.
George arrived separately to his parents the Prince and Princess of Wales and his younger siblings Princess Charlotte and Prince Louis.
Kate shunned a tiara for a floral headpiece and an Alexander McQueen gown complete with a robe while William also wore a robe with his Welsh Guards uniform.
Louis wore an outfit made by Dege and Skinner which consists of a Hainsworth Garter Blue Doeskin Tunic with specially designed lace work embellishment to the collar, cuffs and fronts. The leg garment is black complete with Garter Blue stripe.
Meanwhile, Charlotte mirrored Kate in her own an Alexander McQueen dress and cape in ivory silk crepe with ivory satin stitch embroidery featuring rose, thistle, daffodil and shamrock motifs to signify the four home nations.
Kate, Charlotte and Louis have no formal roles in the Coronation ceremony, although will no doubt be looking on with pride as William and George take part. William will pay homage to his father the King by pledging allegiance to him.
After the ceremony all five of the Wales family will join the procession back to Buckingham Palace behind the gold state coach, where the route has been lined with wellwishers.
They will ride in a carriage, which will be followed by a series of other carriages carrying the likes of the new Duke and Duchess of Edinburgh as well as Lady Louise Windsor and James, the new Earl of Wessex.
In addition, the family will appear on the Palace balcony later where they will greet the huge crowds and enjoy the RAF flypast.
However, one royal relative that will not be joining them on the balcony is Prince Harry - who was hugely critical of brother William and sister-in-law Kate in his memoir Spare.
An insider claimed Harry will be "in and out of the UK in 24 hours" and that he won't attend the Coronation Concert at Windsor Castle tomorrow night either so he can get back to son Archie, who turns four today.
The ceremony is expected to end at 1pm today so it is believed that the Duke could head to the airport straight after, possibly leaving the country at around 2pm or 3pm.