"It wasn't planned, but when it happened, I thought, 'This is perfect -- I'm ready to be a mom,'" the Russian professional dancer told UsMagazine.com. "This is something really good for me and fulfilling, and it'll give me a whole new meaning in life. I'm really looking forward to it."
Trebunskaya declined to name the child's father, but said he is "very supportive."
She said she plans to return to "Dancing" as soon as she can.
"I love being on the show, and I'll miss it a lot, but I'll still be around visiting," she told the magazine. "I'll be their biggest cheerleader."