Spice Girl Melanie Chisholm was joined by British Olympic champions and a host of television presenters in tackling the Virgin Active London Triathlon.
Mel C completed the VIP Sprint event - a 750 metre swim, 20 kilometre bike ride and five kilometre run - in one hour, 31 minutes and 20 seconds and then hinted she might tackle the full Olympic distance next year.
"This is my second year competing and will definitely not be my last. Roll on next year... Olympic distance?"
Adams, the first woman to win an Olympic boxing gold, said: "I feel really good after doing my first triathlon and would definitely love to do it again next year."
Jones said: "I really enjoyed taking part in the Virgin Active London Triathlon. Hopefully it will inspire more people to take part in something which they wouldn't normally do."