Former Dancing with the Stars pros Edyta Sliwinska and Alec Mazo are expecting their first child together.

“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 have been married since 2007.

Mazo, 35, competed on the show for four seasons and won the first season with partner Kelly Monaco. Sliwinska competed on the ABC series on for 10 seasons.

Slwinska  even posted a photo of her growing baby bump (below) on Instagram with the caption,“There it is, my little secret. Less than 2 lbs little.”