Prince William wants to break with tradition and inform the Queen about the royal birth himself, reports The Sunday Times.
It is royal tradition that the Queen is informed by an official notice delivered to Buckingham Palace when a royal baby is born.
The newspaper reported that Prince William would telephone his grandmother and inform about the royal baby's arrival. "The duke intends to tell the Queen himself," a royal insider told The Times.
Apart from his grandmother, the father-to-be will call his in-laws, Carole and Michael Middleton, the Duchess' siblings, Pippa and James and also his father Charles and brother Harry.
Before announcing to the public about the baby's arrival, the royals will continue the tradition of informing the British Prime Ministers. In this case, Prime Minister David Cameron will be notified about the latest royal member's arrival.
The couple has also consented to follow the royal tradition of informing the monarch. The official document of the royal arrival signed by the St Mary's Hospital team, will be handed over to a waiting driver who will deliver the news directly to the monarch, reports The Times.
The document will be kept on an easel by the gates of Buckingham Palace. The delivery of the letter will be an indication of the birth. But the sex of the baby will not be revealed until the notice is unveiled at the palace gates. The source said the Cambridges "wanted to maintain some of the theater of the notice".
Kate Middleton is due to give birth in the private Lindo wing of St Mary's Hospital, the same suite where Princess Diana gave birth to William in 1982.