The 35-year-old posted the video of him and Milo dancing to Trip A Little Light Fantastic from Mary Poppins Returns to his Instagram page.
Kelvin captioned the post: "Little Milo has been helping me with rehearsals for this weekend's #MarryPoppinsReturns Charleston!
"This soundtrack and this song especially has been on a loop in our house for the last few months since taking Marnie to the cinema (her first cinement trip) to watch it.
"So I'll be doing my best and making sure I don't dissapoint!
"I'm absolutely LOVING this #strictly experience I feel so lucky. @bbcstrictly."
Friends and fans rushed to comment on the video.
Presenter Richard Arnold wrote: "You're doing BRILLIANTLY mate."
One fan posted: "That's so cute."
A second commented: "Ahhh he is such a cutie."
Little Milo has been helping me with rehearsals for this weekend's #MarryPoppinsReturns Charleston!Jamie was forced to pull out of the competition after a serious foot injury.
Kelvin came in and was partnered with Oti Mabuse, who Jamie was originally with.
Kelvin is best known for his role Andy Sugden in ITV's Emmerdale.
He played Andy for 20 years from 1996 till 2016.
His character Andy fled Emmerdale after being framed for shooting Lawrence White.
Knowing he was facing prison, with the help of his brother Robert, Andy left the village with a fake passport and started his life on the run.
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