Three of Great Britain's Olympic silver medal-winning eventing team will contest the Land Rover Burghley Horse Trials next week.
Mary King, Tina Cook and William Fox-Pitt are all confirmed entries for Burghley, which begins on August 30.
The New Zealand bronze medal team from London 2012 will also be out in force, including Mark Todd and Andrew Nicholson, while German team gold medallist Dirk Schrade is another major challenger for the £55,000 top prize.
Fox-Pitt, who won a record sixth Burghley title last year, also leads the HSBC Classics Series, which reaches its conclusion for 2012 at the Lincolnshire event and carries a winner's purse of just under £100,000.
The Classics Series rewards the most successful rider at four-star competitions worldwide over a 12-month period, and Fox-Pitt holds pole position heading to Burghley.
And should he clinch the Land Rover Trophy, it would also give him a remarkable 50th international three-day event victory of his stellar career.
Three of the cross-country fences, meanwhile, that were used at Greenwich Park during London 2012 have relocated to Burghley.
The Olympic Games Horses, The Planet and The Sundials, although separate fences in Greenwich, will be combined to present a feature complex in Burghley's main arena towards the end of Captain Mark Phillips' cross-country course.
"The three Greenwich fences will be an exciting addition to our cross-country course, and we are delighted to be the first to feature them," Burghley event director Elizabeth Inman said.
"The course looks fabulous, and combined with an exciting high-class level of entry, we are definitely in for one of the best Burghley's yet."