Crowds are expected to gather at Sandringham on Sunday for the first public outing of all four of the Cambridge family as Princess Charlotte is christened.
The Duke and Duchess of Cambridge, Prince George and baby Charlotte, who was born at the start of May, have yet to be seen all together.
Guests including the Queen, the Duke of Edinburgh, the Prince of Wales and the Duchess of Cornwall, Kate's parents Carole and Michael Middleton, other family and Charlotte's godparents - who are still to be announced - will gather at the Church of St Mary Magdalene in Sandringham - close to the Cambridges's Norfolk country mansion Anmer Hall on July 5 for the traditional ceremony.
Members of the public will be allowed to gather nearby to see Charlotte and the royals as they make their way to and from the church.
A Kensington Palace spokesman said William and Kate were "delighted" that the paddock outside the church would be open to well-wishers, and were "hugely grateful" for people's warm wishes since the birth of their daughter.
"The Duke and Duchess are hugely grateful for the warm wishes they have received since Princess Charlotte's birth - many of them from local people in Norfolk - and are delighted the paddock can be opened on the day of the christening."
Charlotte's uncle, Prince Harry, will miss the event, having already left tospend three months in Africa where he is working as a ranger following hisdeparture from the Army.
Although the baptism will be a private affair, the star guest is likely to makea rare appearance for the cameras - only the second glimpse of the Princess in public since she was born.
William and Kate are set to bring toddler George, who turns two at the end of July.
The Archbishop of Canterbury, the Most Rev Justin Welby, will conduct theceremony and give an address. He will be supported by The Reverend Canon Jonathan Riviere, the Rector of the Sandringham group of parishes.Princess Charlotte Elizabeth Diana of Cambridge, who is fourth in line to thethrone, was born on May 2 at 8.34am, weighing 8lbs 3oz.