It was a memorable time for Lucy, as she also met her boyfriend, Louis Smith, as he was a judge on the show. However, romance didn't blossom for the pair until afterwards.
Sharing a photo collage with fans, Lucy said: "1 year ago since I started training for BBC1's Tumble! I have the most incredible memories from this time!! & gained 2 best friends @katie_richards_csci @billyjacques & I met my gorgeous man @louissmith1989 #Throwback #Tumble #BBCOne #gymnastics #circus #Live #performing #LifeExperience."
Speaking earlier this year on ITV's Lorraine, Lucy said: "He's a really lovely guy. We met there [on Tumble] but nothing happened on the show, but do you know what, I regret that, I might have got higher scores!"
Just this week, Lucy and Louis made a picture perfect couple as they attended a fashion party in London.
The couple have gone from strength-to-strength, and if they're not cosying up together on date nights, Louis is making sweet romantic gestures thousands of miles away.
Earlier this month, Louis dismissed rumours that he and Lucy are getting engaged after speculation that the pair were set to wed.
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Lucy - life after TOWIE: