The 26-year-old actress has thanked fans for their well-wishes after announcing happy baby news.
Dani is expecting her first child with boyfriend Simon Brough, who she has been dating for almost a year.
She tweeted fans: "Thank you all so much for your lovely tweets! Such an exciting time for me and @sbrough18 xxxx."
Thank you all so much for your lovely tweets! Such an exciting time for me and @sbrough18xxxx— Dani Harmer (@MissDaniJHarmer) January 25, 2016
Dani is best known for her role as Tracey Beaker in the CBBC show The Story of Tracy Beaker. She also competed in the 2012 series of Strictly Come Dancing where she finished in fourth place after being paired with Vincent Simone.
She most recently starred in the UK tour of The Rocky Horror Show.
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