Sliwinska married her former "Dancing with the Stars" co-star Alec Mazo in 2007.
"I'm due in January and we are having a boy," Sliwinska told People.com Thursday. "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."
Notable deaths of 2014 [PHOTOS]