His wife the Duchess of Cornwall's daughter Laura Lopes is expecting again - and it's twins. Her idyllic country wedding to City accountant Harry Lopes was quickly followed by the birth of Eliza, now 18 months.
Camilla also has another granddaughter from the marriage of her son, food writer Tom Parker Bowles, to fashion editor Sarah Buys.
The couple wed in a sophisticated ceremony, attended by the likes of Hugh Grant and Mick Jagger in London 2005.
When their little one Lola was born the royal declared herself "absolutely over the moon". In October 2007
And this time it was Camilla herself who let the cat out of the bag about the latest exciting news while chatting to members of the Women's Institutes at the Prince of Wales' country home Highgrove, reports the Daily Mail.
A family source told the newspaper: "It's all very exciting. There have never been twins in the family before".