All-time World Rugby Sevens Series leading try scorer Dan Norton will spearhead the Great Britain men's challenge at the Tokyo Olympics.
Abbie Brown and Megan Jones will co-captain the women's squad, which sees 2014 World Cup winner Natasha Hunt called up for her second Olympics.
Women's head coach Scott Forrest said: "This squad for me has the potential to go and win a gold medal."
GB men won silver at the 2016 Rio Olympics, while the women came fourth.
Alex Davis - named in the men's squad - was flown home on the eve of competition at the 2016 Olympics because of injury.
He tweeted: "It's taken a lot of resilience and self discovery to reach this point today. Thank you to all who have supported me through the good times and bad. It's been a ride."
GB Olympic sevens squads
GB women: Holly Aitchison, Abbie Brown, Abi Burton, Deborah Fleming, Natasha Hunt, Megan Jones, Jasmine Joyce, Alex Matthews, Celia Quansah, Helena Rowland, Hannah Smith, Emma Uren.
Women's reserve: Lisa Thomson
GB men: Dan Bibby, Alec Coombes, Alex Davis, Robbie Fergusson, Harry Glover, Ben Harris, Ollie Lindsay-Hague, Ross McCann, Max McFarland, Tom Mitchell, Dan Norton, Ethan Waddleton.
Men's reserve: Tom Bowen
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