Eugenie is not pregnant – Duchess of York quashes grandmother-to-be rumours

Eugenie married long-term boyfriend Jack Brooksbank at Windsor Castle last October and there has been speculation the couple will be starting a family soon.

Sarah's impromptu speech was recorded and posted on social media by Kelly Lynch from the online firm Dailybreak, following the Saturday night event at Mr Boch's estate in Norwood, Massachusetts.The former member of the royal family also joked about her son-in-law saying: "Jack sells tequila for Casamigos, which we love. It makes me even more of a yummy mummy because I just drink the tequila when I go and sell it."

The duchess has remained close to her former husband the Duke of York, sharing homes with Andrew in the UK and in Switzerland where they have a luxury chalet.

Sarah told the guests: "Yes I do live in the royal lodge with my handsome prince, who is the best-looking prince of the whole darn lot."