Pippa Middleton attended the wedding of a former girlfriend of Prince William, without her boyfriend Nico Jackson.
The Duchess of Cambridge's younger sister attended the marriage of Arabella Musgrave to George Galliers-Pratt, at St Paul's Church, Knightsbridge.
Miss Musgrave, a Gucci PR, went out with William in 1999 before he went to St Andrews University and famously met Kate.
Arabella, the daughter of Major Nicholas Musgrave, a former manager of Cirencester Polo Club, has kept in touch with William and has since befriended Kate and Pippa.
But neither William, who is in Spain on a hunting trip, nor Kate, who is with members of her family in Mustique, was able to attend yesterday.