Great Britain's showjumping team for London 2012 will contain Olympic debutant Scott Brash.
Brash was named in a four-strong group alongside world number three Nick Skelton, 2008 Olympian Ben Maher and former European champion Peter Charles.
Like Brash, 52-year-old Charles will also make his Olympic debut for Great Britain, but he has twice represented Ireland at the Games.
Brash will ride Hello Sanctos, Charles has been selected on Murka's Vindicat W, with Skelton riding Big Star and Maher aboard his Olympia World Cup winner Tripple X III.
Tina Fletcher and Hello Sailor are the reserve combination for London.
Britain last won an Olympic showjumping medal in 1984, while their last individual podium finish came at the Munich Games 12 years earlier.
Brash, Skelton and Maher were always front-runners for the British team, given their consistent form in Nations Cups and at grand prix level.
And the fourth spot appeared to be a battle between Charles and Fletcher for some time, with Hampshire-based Charles getting the nod from British team chief Rob Hoekstra and his fellow selector Di Lampard.
Among those riders who miss out are experienced Olympians John and Michael Whitaker, Guy Williams and Tim Stockdale, who made a remarkable recovery from a broken neck suffered just seven months ago to make his selection push for London.
Sunday's announcement by the British Olympic Association completes the London-bound home equestrian contingent after the eventing and dressage teams unveiled last month.
Skelton, 54, will ride at his sixth Olympics, and alongside Maher was part of Britain's bronze medal-winning team at the European Championships in Madrid last September, where Warwickshire-based Skelton also clinched an individual bronze.
Brash, from Peebles, only gained the ride on Hello Sanctos at the end of last year, but they quickly became a strong partnership, which was highlighted by a grand prix victory during the Florida Winter Festival.
Liverpool-born Charles, whose mother is Irish, has the experience of competing at both the Barcelona and Atlanta Olympics for Ireland. He won the 1995 European title and can also claim a hat-trick of Hickstead Derby successes.
Hoekstra said: "I am very excited. The decisions have been made, and everyone has had a chance to show us what they can do.
"We are going to London with an extremely strong, talented and young team of horses.
"We have three 10 year-olds and one nine-year-old, which I would imagine to be the youngest team of horses that you will see there.
"As a team, we go as a strong unit, fighting together with an aim of making Great Britain proud.
"I am very grateful to our loyal owners who have made these horses available to us, and we are now focused on the challenge ahead and our preparations in ensuring we peak at the right time."
Brash, 26, admitted his Olympic selection has continued a whirlwind journey through to the top echelons of British showjumping.
"I remember watching the Olympics four years ago and never thought that I would be in the position I am in today where I am preparing for London 2012," he said.
"Everything has happened so quickly, and each year has just got better and better for me.
"When I think about the fact that I only got the ride on Sanctos at the end of last year, and the way we have bonded along with the confidence I have in him, it's quite remarkable."
Charles added: "I don't usually get too emotional about these things, but this is different.
"It is already a great achievement and a great honour for me to be selected to compete for Team GB. l will now sit down with Rob Hoekstra to make plans for our best preparation.
"Vinny (Murka's Vindicat W) is a wonderful athlete. He might be the least experienced horse on the team, but he more than makes up for that in talent and ambition. He's only a small horse, but he's a big fighter."
Maher, from Hertfordshire, has gone close to individual medal success in previous major championships, and he admitted: "The hard work really starts now.
"There is a lot of pressure to live up to. Hopefully, we can pull everything together at the right time.
"Hugo (Tripple X III) is home-bred, which makes this extra special. The horse has only ever had me on his back in competition, so by now we know we trust each other."
Skelton was in the enviable position of having two potential Olympic horses in Big Star and Carlo, but it is on Big Star that he will mount what should be a strong medal challenge.
"The horses are going well at the moment and I hope we've got a good chance, although you never know what will happen on the day," Skelton said.
"I've just got to thank Gary and Beverley Widdowson, the horse's owners, who have stuck by me even though I am getting on a bit in years.
"Having a horse at the Olympics has always been their aim. They've refused a lot of money, and not many would have resisted the temptation to sell, so I am very lucky to have their support."
Team: Scott Brash, Nick Skelton, Ben Maher, Peter Charles.