As guests when Bernie Ecclestone's 22-year-old daughter tied the knot, Sarah, Duchess of York and her daughter Beatrice and Eugenie had an invite to one of the most lavish weddings of the year.
The proud father had splashed out a slice of his considerable fortune to ensure his youngest girl had the wedding of her dreams.
Petra wed businessman James Stunt, 26, in Odescalchi castle, the spectacular 15th-century Italian fort where Katie Holmes became Mrs Tom Cruise.
But despite the estimated £5-million bill as with any ordinary family what really made the wedding so special were the many personal touches provided by friends.
Eric Clapton sang as the young lovers shared their first dance as man and wife.
Earlier in the day as the bride, exquisite in a £80,000 creation by Vera Wang, rolled up to the venue in a vintage Rolls Royce her driver was none other than other than F1 star Jean Alesi.
More pictures from the fabulous wedding