The duo were paired up just a fortnight ago, but last week one tabloid claimed they had spent a “night in” together.
Speaking to HuffPost UK at the Diversity In Media Awards, the former Saturdays star insisted this was not the case.
She said: “I think there’s always some kind of romance rumour so it didn’t surprise me but I hardly even know him well so far, so there’s no truth in that.
“But he’s such a sweet heart and obviously he is a beautiful boy so I’m very lucky.”
The ‘Strictly’ live shows start later this month and Mollie will make her debut with a jive, something she admitted to being “terrified” about.
“It’s so quick, it’s so fast [that] my feet are getting tangled up, but yeah, I can’t wait to go and do it,” she said. “Fingers crossed that it goes ok.
“I can’t sleep without jiving in my head.”
Mollie is an early favourite to do well in the competition, along with former ‘X Factor’ stars Alexandra Burke and Aston Merrygold.
The ‘Strictly’ live shows will launch on Saturday 23 September. See what dances the celebs are doing - and what songs they’ll be doing them to - here.