Prince Harry all smiles as he sits in third row at Coronation after walking alone down the aisle at Westminster Abbey (Photos)

Prince Harry was all smiles for the historic Coronation of King Charles III at Westminster Abbey.

The Duke of Sussex, 38, was forced to walk down the aisle by himself to take his seat in the third row ahead of the arrival of his father and soon-to-be Queen Camilla.

Wearing medals pinned to his suit jacket, he was pictured smiling as he entered the royal church alongside Princesses Eugenie and Beatrice and their respective husbands Jack Brooksbank and Edo Mapelli Mozzi.

Harry had not been seen for over 24 hours after his arrival and before it emerged he had flown into the UK on a commercial American Airlines flight on Friday morning.

It comes after it was reported today that the King’s youngest son, who was expected to stay at Frogmore Cottage overnight, is invited to lunch at Buckingham Palace today following the historic service.

It is not yet known if the Duke will attend the lunch given that he is expected to rush back to California to reunite with his wife Meghan Markle to celebrate their son Archie’s fourth birthday.

The invitation will likely be seen as an olive branch from Charles after Harry’s explosive memoir Spare left several members of the Royal Family including his brother Prince William sad.