October 10, 2013 06:30 PM

Araya Diaz/Wireimage

It could be their best move yet.

Edyta Sliwinska and Alec Mazo, the former Dancing with the Stars professionals, are expecting their first child early next year, the couple confirm to PEOPLE.

“I’m due in January and we are having a boy,” Sliwinska, 32, tells PEOPLE exclusively. “We’ve been together for 13 years; married for six. We were both so ready for it and we’ve been planning on this for the past couple of years.”

The couple, who were married in 2007, competed on the professional Latin ballroom circuit for years before joining DWTS for its first season in 2005.

Russian-born Mazo, 35, competed on four seasons, winning the first season with partner Kelly Monaco. Polish-born Sliwinska was on for 10 seasons. She made it furthest in season six, finishing second with Jason Taylor.

Courtesy Edyta Sliwinska

After the show’s 10th season in 2010, Sliwinska wrote on Facebook that it was “time to think about my future. I’m pursuing my education and looking forward to other projects that perhaps you will hear about, but my main goal is to finish my degree and start building a family.”

“There it is, my little secret. Less than 2 lbs little,” the mom-to-be captioned a selfie showing off her tiny baby bump which she posted on Instagram on Thursday.

— Tim Nudd with reporting by Monica Rizzo

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