"Happy days for our little family," the Countdown presenter wrote on Instagram.
"We saw how she transformed into that beautiful dancer," her partner Pasha Kovalev recalled. "A dancer with a big heart on her sleeve."
They are the second couple to get married after meeting on the BBC ballroom show.
The professional dancer had been at a North London theatre watching Katya and Neil Jones perform.
Rylan Clark and his mum provided plenty of laughs alongside Little Mix, Sheila Hancock and Rachel Riley.
She announced the news with a Countdown conundrum.
He reckons there needs to be more British talent represented on the show.
It had the wow factor.
He says it's time for a "new challenge".
"She’s an absolute sweetheart and doesn’t deserve that."