Speaking about her Olympic call-up, Zara Philips said: "High Kingdom is a pretty cool, very relaxed kind of guy, I was really happy with him at Bramham as he’d obviously grown up and is improving all the time.
"He’s pretty ponylike, a nippy little jumper and easy to manoeuvre so hopefully it will suit himwell in Greenwich.
"High Kingdom is owned by Trevor Hemmings who’s been one ofmy earliest supporters – he’s owned a lot of my horses and has been sosupportive, I couldn’t do it without him.”
Zara Phillips has been picked to represent Great Britain at this summer's Olympic Games in London.
The Queen's granddaughter described her selection to the eventing team as "awesome".
Phillips, the 2006 world champion, is following in the footsteps of her parents, who both rode in the Olympic Games for the country.
Her mother, the Princess Royal, competed at the 1976 Montreal Games, while her father Captain Mark Phillips was a team gold medallist at Munich in 1972 and then won silver in Seoul 16 years later.
Phillips said: "It's awesome to be given this opportunity.
"I am really excited and can't wait to kick on and get him there. Hopefully, we will make it this time."
The eventing star will ride High Kingdom at Greenwich Park next month.