Jenna Randall and Olivia Federici are among the nine synchronised swimmers who have been officially selected to compete for Team GB at this year's Olympics.
Randall and Federici will take part in the duet event in London, the second time they have represented Britain after they finished 14th in the last Olympics in Beijing.
The seven other athletes, including Jenna's younger sister Asha, will make their Olympic debuts as Great Britain enters a full synchronised swimming team for the first time.
Much is expected in London as the duet and the team are both now ranked inside the world's top 10.
"It's fantastic knowing that I will be going to the Olympics this year," said Jenna Randall. "I can't wait to hear the home crowd and know that everyone is behind us. We got a taste of it at the test event and to think that was only a quarter full is really exciting.
"The Olympics is going to be a great opportunity for us to show the British public how great our sport is and hopefully get more young children joining in and experiencing the diversity of synchronised swimming."
With the marathon, boxing, canoe slalom, sailing and swimming squads all decided, Tuesday's announcement means 76 athletes have now officially been selected to compete for Team GB in London.
Chef de mission Andy Hunt added: "We are delighted to welcome a full complement of nine synchronised swimmers to Team GB for the London 2012 Olympic Games. The synchronised swimmers train incredibly hard and, under the expert guidance of Biz Price, have demonstrated consistent progress over the last four years.
"This group of athletes have recorded some impressive results in both the duet and team events recently, and I am sure they will grasp the opportunity offered by the London 2012 Games with both hands and demonstrate their presence at the top table of the sport with their performances."
Team GB's synchronised swimming team: Yvette Baker, Katie Clark, Katie Dawkins, Olivia Federici, Jennifer Knobbs, Vicki Lucass, Asha Randall, Jenna Randall, Katie Skelton.