The pair will be dancing to Moon River from Breakfast At Tiffany’s and the 31-year-old has confessed she’s worried about how slow the routine is.
She admitted she felt confident at the start of the week but is now concerned about how exposed she will be.
In a clip shown on It Takes Two this evening, Stacey and Kevin could be seen in rehearsals.
Stacey confessed: “I thought I would be fine at the Waltz.
“I thought I’ve got the ballroom, I’ll be good to go. But actually it’s tricky.”
Kevin added: “I’m not taking it easy on Stacey in this dance, I’m putting in a lot of complicated choreography.”
BBC Three documentary-maker Stacey went on to note: “The thing is with this one is it’s so slow.
“You’re totally exposed.”
Kevin finished: “It takes a lot of control through the ankles and feet to really hang on to the beats and make them as smooth as possible.”
Stacey and Kevin are favourite to lift the Glitterball Trophy on the show this year.
A spokesperson for Coral, Harry Aitkenhead, told Express.co.uk: “It’s been another week where Stacey has dominated our betting and punters are backing her to win without any doubts in their mind.
“The way things are going we expect her to go odds on any week now and it looks like she’ll be incredibly hard to beat to the Glitterball Trophy.”
Her odds of winning have been cut to 6/4 as she continues to impress both judges and viewers.
However, it’s not good news for Kate Silverton.
After failing to impress the judges with her Argentine Tango last week, Kate is favourite to be eliminated next.
“We think that Kate is on borrowed time now and if she does end up in the bottom two she will struggle to fight her way onto the next week,” Harry said.
“This one could be her last on the dance floor.”
Her odds of being booted off next are at 2/1.
Strictly Come Dancing airs tomorrow on BBC One at 7pm.