'Are you the Queen… or a princess?' Robbie Williams' cheeky daughter quizzes Fergie

Robbie Williams and Ayda Field's daughter Theodora 'Teddy' Williams stole the show. Photo / Getty

Robbie Williams and Ayda Field's daughter Theodora 'Teddy' Williams stole the show outside Windsor Castle on Friday following the wedding of Princess Eugenie and Jack Brooksbank.

Spotting Sarah Ferguson on the steps outside St George's Chapel, as the six-year-old made her first public appearance, she drew laughs when she boldly asked Fergie in her sweet American accent if she is the Queen according to DailyMail.

Flower Girls Princess Charlotte (L) and Theodora Williams wave following the wedding of Princess Eugenie of York and Mr. Jack Brooksbank at St. George's Chapel. Photo / Getty

"No, I'm not the Queen," Fergie replied, "You're a princess?" she enquired further in a confident fashion.

"Yes" Sarah responded, despite the fact she is not a princess, but instead the Duchess of York, as she rushed down the steps.

And the six-year-old flower girl did not appear phased by the exchange, as she confidently held her bouquet in the air as the group posed for photographs, with the other children politely held a pose.

Her famous parents are known for keeping their family life relatively private and away from the spotlight, but little Teddy did not seem to shy away from the spotlight.

The six-year-old was a flower girl, along with Princess Charlotte and pageboy Prince George, for the ceremony that saw Princess Eugenie and Jack Brooksbank exchange nuptials.

(L-R) Best man Thomas Brooksbank, Sarah Ferguson, Princess Beatrice of York, bridesmaids and page boy, Prince Andrew, Duke of York, Thomas Brooksbank. Photo / Getty

Theodora looked as cute as a button in her flower girl getup, an ivory dress with a frilled collar and sleeves and patterned belt, as she waved to onlookers while making her way up the steps into the chapel.

The youngster was among a number of children who acted as flower girls and pageboys on the day - including Prince William and Kate Middleton's brood, Zara and Mike Tindall's daughter Mia and Isla and Savannah Phillips.

Bridesmaids Princess Charlotte of Cambridge, Savannah Phillips, Maud Windsor, page boy Prince George of Cambridge, bridesmaids Isla Phillips, Theodora Williams. Photo / Getty

Clad in their wedding attire, the kids looked utterly adorable as they stopped to pose for photographs alongside Eugenie's mother Fergie, Princess Beatrice and Prince Andrew, the Duke of York, on leaving the ceremony.

Robbie and his wife Ayda, who are currently starring as judges on the new series of The X Factor, were no doubt proud as punch over their little girl as she led the young wedding party.