Photographed by Robert Fairer1/21Sieber trying on an option for her wedding weekend at the Chanel Haute Couture salon in Paris.
Photographed by Robert Fairer2/21Inspiration images.
Photographed by Robert Fairer3/21Another, more colorful, option.
Photographed by Robert Fairer4/21A rack of couture choices to try.
Photographed by Robert Fairer5/21Sieber wearing her wedding dress during one of her fittings on the famous mirrored staircase at the Chanel boutique at 31 Rue Cambon.
Photographed by Robert Fairer6/21The Heuriger Wine Tavern in Vienna, where Friday night’s rehearsal dinner took place.
Photographed by Robert Fairer7/21The dress code was “tracht”: dirndls for girls, lederhosen for boys.
From left: Sieber, von Westenholz, Arthur Wellesley, Earl of Mornington, Jemma Kidd, and Jacquetta Wheeler.
Photographed by Robert Fairer8/21Putting on the final touches before the Catholic wedding ceremony.
Photographed by Robert Fairer9/21Two of the ten flower girls and page boys.
Photographed by Robert Fairer10/21Sieber arriving at Michaelskirche, one of Vienna’s oldest churches.
Photographed by Robert Fairer11/21The bride and groom at the altar.
Photographed by Robert Fairer12/21Leaving the ceremony.
Photographed by Robert Fairer13/21The reception at the Palais Pallavicini.
Photographed by Robert Fairer14/21Matching ladies in red: Sophia Hesketh, Jacquetta Wheeler, and Lauren Santo Domingo, all in Dolce & Gabbana.
Photographed by Robert Fairer15/21Mr. and Mrs. Von Westenholz cutting the cake.
Photographed by Robert Fairer16/21Pippa Middleton.
Photographed by Robert Fairer17/21A gingerbread Valentine for the newlyweds.
Photographed by Robert Fairer18/21An aerial view of Vienna.
Photographed by Robert Fairer19/21For the black-tie evening soiree, Sieber wore a white net gown embroidered with violets, created for her by friend Christopher Kane.

Photographed by Robert Fairer21/21From left: Virginie Courtin-Clarins (in Louis Vuitton), Prisca Courtin-Clarins, Hamish Bowles, Claire Courtin-Clarins (in Louis Vuitton), and Jenna Courtin-Clarins.