The soon-to-be mum is certainly qualified to talk all things health. She's not only an Olympic swimmer, but has looked totally healthy and glowing throughout her pregnancy.
Yes, we know all about the 'pregnancy glow', but the I'm A Celebrity star has also fuelled up on smoothies and kept exercising to look THIS good!
Becky tweeted her excitement about the event earlier today: "Its finally here @BeFitLondon !!!! I will be on stage answering questions at 1.30pm look forward to seeing you then :-) #BeFitLondon"
It's only five weeks to go until the gold medalist has her baby girl, but that doesn't mean things are slowing down!
Just last night (30 April), Rebecca cradled her baby bump as she posed happily at the BT Sports Industry Awards.
The athlete looked stunning in a white, black and blue dress. Perhaps next year she can bring her mini-me to toddle the red carpet with her?!
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Stars who have announced baby news this year:
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