The 57-year-old host stunned in a strapless orange dress by Australian designer Alex Perry, as seven celebrities took to the stage to dance the night away.
Sonia made sure she stood out from the crowd in the striking gown, which featured a daring thigh-high split.
The mum-of-one paired the number with a pair of perspex heels and kept her signature blonde locks in tousled waves.
"Is there no clothes that cannot pull off. Fab as always," one person commented online.
Another person called the look 'fierce' while a third wrote: "Stunning'
“Massive respect to all the ladies out there who rock the grey. Liz Ellis, Andie MacDowell and Jamie Lee Curtis are beautiful, sexy and intelligent women,” she wrote.
“They’re also far braver than me. I would rather have a molar extraction than see my natural hair colour.
“That might sound extreme but I’m incredibly vain and also in denial about a lot of things.”
Sonia went on to say that she’s all for 'disproving' the trend that ‘women become invisible’ after a certain age and she likes to ‘curate’ her image, wearing neon colours, bright nails and her trademark blonde locks.
Being fit and healthy is a huge priority for Sonia, who is mum to daughter Maggie, eight.
“When you’ve come back from having a baby you want to do things gradually, you want to do things that are just a little bit more gentle on the body. So that’s why Strictly You came about,” Sonia told WHO earlier this year.
"Dancing itself is one of the best forms of fitness there is because it’s cardiac, it’s a great cardio workout. It’s toning. It’s great from a muscular perspective. It’s great for the joints because you’re using your own body weight as resistance. It has everything. You only have to look at the dancers’ bodies on Dancing with the Stars."
Sonia also added that the dance workouts are a "great stress reliever".
She also shared that she doesn't keep any food off limits and will enjoy a cocktail or chocolate if she wants one.
Last night's premiere episode of Channel 7's Dancing With the Stars got off to a dazzling start, with Home and Away's Emily Weir dancing a sexy Samba and scoring a total of 26 from the judges.
However, she was pipped to the top spot by singer Paulini, who scored 28 points with her energetic Samba.
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