Kensington Palace has announced the royal baby will be christened at St Mary Magdalene Church in Sandringham on Sunday July 5.
Archbishop Justin Welby said: "I am delighted to be invited to conduct the baptism of HRH Princess Charlotte.
"It will be an extraordinary honour and privilege to help welcome the Princess into the family of the church.
"Along with her parents and all her family, I look forward to joining in this joyful day of celebration and thanksgiving."
Princess Charlotte was born on 2 May 2015 and is the youngest child of Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge.
The princess is fourth in line to succeed to the throne after her grandfather Charles, father William and elder brother Prince George.
Kensington Palace said in a short statement: "Their Royal Highnesses the Duke and Duchess of Cambridge are pleased to announce the christening of Princess Charlotte will take place on Sunday, 5th July at St Mary Magdalene Church, Sandringham.
"Princess Charlotte will be christened by the Archbishop of Canterbury, the Most Reverend Justin Welby."
The archbishop also conducted the christening of Prince George.
Duke and Duchess of Cambridge pose with Prince George on his birthday