Vicky Holland, Lucy Hall and Stuart Hayes will join Alistair Brownlee, Jonny Brownlee and Helen Jenkins in the Great Britain triathlon team at the London Olympics.
The latter trio booked their places last year after superb seasons, with Alistair Brownlee and Jenkins winning their second world titles and Jonny Brownlee establishing himself as world number two.
Britain have never won an Olympic medal in triathlon but it would be a major surprise were they not to change that statistic this time.
Alistair Brownlee in particular has been utterly dominant over the last three years, winning 11 of the 15 World Triathlon Series races he has competed in, and he and Jenkins had impressive wins over the Olympic course in Hyde Park last year.
Alistair Brownlee's preparations have been disrupted by an Achilles tear but he returned to action on Saturday by winning the Blenheim Triathlon and he will compete in his first World Series race in two weeks' time in Kitzbuhel.
The 24-year-old said: "It's good to be back racing. When you've had an injury you're never quite sure how it's going to respond.
"You can train on it as much as you like but racing is that little bit different so it's nice to come and do a race and it be all right.''
Jonny Brownlee has shone in his brother's absence, winning World Series races in San Diego and Madrid, and the pair will go into the Games as favourites to win gold and silver.
The selection of the rest of the team has been controversial, with British Triathlon making clear their stated intent to win a medal and leaving open the possibility of picking domestiques to help their team-mates rather than the best athletes individually.
The governing body are not saying in what capacity Holland, Hall and Hayes have been selected, but in the case of the latter two especially, it appears they will be there in a supporting role.
Holland has hit form at just the right time with top-seven finishes in San Diego and Madrid and may well race in her own right.
Hall, 20, has never finished higher than 37th in a World Series race over the Olympic distance but she is one of the fastest swimmers in the sport and may well be able to help Jenkins split the pack, giving her a better chance of victory.
Hayes, who will also be making his Olympic debut at the age of 33, won the World Series race in Kitzbuhel in 2010 but has not had any results of note since.
However, he is an experienced and highly respected team member and his prowess in the 40km bike leg is likely to have swayed the selectors.
If things go to plan, then the Brownlees will not need the extra help but Hayes will also be there should things go wrong, as they did at the European Championships last year when Alistair Brownlee picked up a puncture but still won after his team-mates worked with him to get back to the pack.
The selection means the likes of Tim Don, Will Clarke, Jodie Stimpson and Liz Blatchford, who have all had good results at elite level, missed out, and a number of athletes did ask for the decisions to be reviewed, although none was successful.
Clarke told the BBC: "It's hard because two of those people have basically walked onto an Olympic team. There's not really any other sport like that, where someone qualifies so easily considering what others like us have been through.''
Blatchford, meanwhile, said on Twitter: "Now that it's official I can say I am devastated to have been left off the GB Olympic team.''
Hall acknowledged the difficult situation, saying: "As an athlete I can see it from their perspective but I hope people don't see it as my fault and they realise I was selected to do a job.
"It's horrible to think some people don't get to fulfil their Olympic dreams - I hope they understand why I'm taking this opportunity. It's a home Olympics, I can't turn it down.''