Beatrice, 30, wore a blue dress with a simple brooch and arrived with mother of the bride Sarah, Duchess of York.
“Fergie”, who spent years as an outcast from the royal family following her split from Andrew, was cheered by crowds as she stepped out of a chauffeur-driven car.
The Duchess, dressed in emerald green, embraced two crowd members before ascending the steps with Beatrice, stopping to give one final wave to another cheer from the assembled spectators.
Other royal family members in attendance include Queen Elizabeth, Prince Philip, Prince Charles, Kate Middleton and Prince William amongst others.
Also present at the chapel are 850 guests including celebrities Demi Moore, Robbie Williams, Naomi Campbell and Holly Valance.
Channel 7 will bring you every moment of Eugenie's wedding live as it happens, as the only Australian broadcaster with cameras inside the Chapel. More info here!