Prince Louis, the third child of Britains Prince William and wife Kate, will be christened at a small, private ceremony overseen by the Archbishop of Canterbury later on Monday, but Queen Elizabeth will not be there, his fathers office said.
Louis, the fifth in line to the British throne who was born on April 23, will be christened at The Chapel Royal of St Jamess Palace in central London.
However, his great-grandmother the queen and her husband Prince Philip will not be among the guests, Kensington Palace said.
A royal source said it had been agreed some time ago that the 92-year-old queen would not attend the small, family affair and her absence was not due to any health issues.
Kensington Palace said Williams father Prince Charles and his wife Camilla would be present along with younger brother Prince Harry and his wife Meghan.
Also attending are Kates parents, her brother and sister and Louiss six godparents, who are close friends or relatives of William and Kate.