Princess Charlotte, the daughter of Prince William and the Duchess of Cambridge, will be christened on July 5.
A Kensington Palace statement quoted by the BBC, said the christening will take place at St Mary Magdalene Church at the Queen's Sandringham estate in Norfolk.
The princess was born on May 2 at St Mary's Hospital in London, weighing 8lb 3oz (3.7kg).
The Archbishop of Canterbury, Justin Welby, will conduct the baptism, and described it as an extraordinary honour and privilege to help welcome the princess into the family of the church.
The princess, who is fourth in line to the throne, has been registered as Her Royal Highness Princess Charlotte Elizabeth Diana of Cambridge.
The family has been at their home Anmer Hall on the Sandringham estate since leaving London shortly after the birth of the princess, their second child.
