Guests at the royal christening will be served tea and cake at the Queen's country retreat Sandringham House after the ceremony.
The Duke and Duchess of Cambridge will walk from the house to the St Mary Magdalene Church for the 45-minute service which starts at 4.30pm.
Princess Charlotte will be baptised in the hand made replica of the Royal Christening Robe, made by the Queen's dressmaker Angela Kelly.
The royals and their guests will then head back to Sandringham where they will be served tea and slices of christening cake - which is a tier taken from William and Kate's wedding cake.
The Duke and Duchess of Cambridge have chosen five godparents for their daughter Princess Charlotte.
William and Kate asked Miss Fellowes - the daughter of one of Princess Diana's sisters, to take on the spiritual role for the nine-week-old Princess.
Kate's cousin Adam Middleton was also asked along with the couple's friends Sophie Carter, James Meade and Thomas van Straubenzee.
The godparents will join the royals, which include the Queen and Prince Philip, Prince Charles and Camilla, and the Middleton family.
Prince Harry will not attend the service as he is on a long-planned trip to Africa.
The youngest royal will make her second public appearance later this afternoon when she is baptised in Norfolk.Read the full story ›
Ex-Spitfire pilot Allan Scott, 94, said he was told off by the Queen when he first met her in 1943 when she was just 16.Read the full story ›
Last minute preparations are going on at the Church of St Mary Magdalene where Princess Charlotte will be christened.Read the full story ›
Princess Charlotte is being christened on Sunday at Sandringham in Norfolk in only her second public appearance since she was born.Read the full story ›
The Duke and Duchess of Cambridge have submitted a planning application to have a new tennis court built at their Norfolk home.Read the full story ›
The Duke of Cambridge has called England Women footballers to wish them well in their World Cup semi-final against JapanRead the full story ›
The Queen has spoken of the "horrific" scenes British forces faced when they liberated the Bergen-Belsen concentration camp as she visited the notorious site.
At the camp in northern Germany where 70,000 people died from disease, starvation or brutal mistreatment, the Queen and Duke of Edinburgh paid their respects by laying a wreath.
With quiet dignity and the minimum of protocol, the royal couple toured the site which was razed to the ground and is now a museum and memorial to those who died during the Second World War.
ITV News Royal Editor Tim Ewart reports:
The Queen and the Duke of Edinburgh have laid a wreath at the former Nazi death camp at Bergen-Belsen.
In Her Majesty's first trip to the site of a concentration camp, she paid her respects to the tens of thousands of people who died there.
The royal couple toured the site in northern Germany which was razed to the ground and is now a museum and memorial.
At the site's Inscription Wall, she and Philip laid a wreath near the words "To the memory of all those who died in this place".