Event director Daniel Watson confirmed four-time Olympian Jennie (pictured, below) as the show’s honorary president, and European team gold medallist William (above) as a jumping ambassador.
“I am absolutely thrilled that two such eminent people in the equestrian world as Will and Jennie will play a key part in the first London Spring International,” said Daniel.
“To have their support and witness their enthusiasm for this new event has been a delight, and I know they will both bring a huge amount, both during the build-up, and then at the show itself.”
The show, which is to run at the Ex-Cel exhibition centre in London from 12-17 April next year, has been described by organisers as a “celebration of the horse”.
“Some of equestrian sport’s greatest spectacles will be on show at the London Spring International — from the serenity of dressage to dramatic showjumping action including a grand prix finale and the puissance,” said a spokesman.
“British Olympian Richard Davison will also conduct his highly-acclaimed masterclass, offering a fascinating insight into the sport of dressage, one that has never been more popular in Great Britain.”
Dressage is to take top billing on the first two days, with classes including grand prix special and freestyle, while the showjumping will start on Good Friday (15 April) and run throughout the Easter weekend.
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British Showjumping amateur classes will also run at the event, along with displays and music.
Daniel has previously told H&H his aim is to attract and engage the wider public, as well as fans of equestrian sport, with the show.