The gold medallist - who retired from swimming in February - is rumoured to have bagged herself £80,000 to appear on the thirteenth series of the show, which returns to ITV1 on 17 November.
A source told The Sun: “Becky is only young and keen to muck in and get herself out there.
“When you retire from professional sport you are constantly looking for new challenges.
“Competitive people don’t just switch off once their playing days are over.”
Becky's decision to head to the jungle comes after she previously admitted she'd never do a show like 'I'm A Celeb'.
“I’m absolutely awful with creepy-crawlies and I couldn’t eat that stuff they do in the jungle,” she said.
Other stars also rumoured to be heading to the jungle include 'TOWIE' star Joey Essex, snooker legend Steve Davis, Westlife singer Kian Egan, former 'EastEnder' Laila Morse, 'Emmerdale' star Lucy Pargeter and former 'Strictly pro' dancer Vincent Simone.