These scandals have seen their divorced parents lose their royal titles and Royal Lodge homes, despite the fact Andrew has always denied any wrongdoing and accusations.
It is not known whether Beatrice and Eugenie, 36, are on talking terms with their parents, who were not invited to the wedding today.
The sisters looked nervous but happy to be attending the happy family occasion, with Beatrice, 37, holding hands with her husband Edoardo Mapelli Mozzi.
It is believed the sisters have a close relationship with their cousin Peter, who would no doubt have really wanted them to attend.