However, she may steal the show as a bridesmaid for Princess Eugenie during her wedding to Jack Brooksbanks, but how much do we know about her? Here's the lowdown…
Theodora Rose Williams, 6, affectionally known as Teddy, was born in 2012 and is the eldest child of pop star Robbie and his wife, X Factor judge, Ayda Field.
The youngster is making her first public appearance as one of Princess Eugenie's flower girls joining Princess Charlotte, Mia Tindall, Maud Windsor, and Savannah and Isla Phillips.
Robbie and Ayda are also parents to three-year-old son Charlton Valentine, and last month they welcomed daughter Colette Josephine via surrogate.
Both Robbie and Ayda go to great lengths to shield her from the spotlight, by only publicly showing photographs of their children with their back to the camera.
Mum-of-three Ayda said: "We never show their faces, it's really important to us.
"We're really proud and we want to share absolutely everything but there's a law in this country that means they can't put pictures up of kids in the papers unless you're posting their faces."
Pop star Robbie, who has publicly struggled with drug and alcohol addiction, credits Teddy with saving his life.
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