Peta Murgatroyd has a lot to celebrate. After taking home the mirror ball trophy with her partner Nyle DiMarco on Dancing With the Stars during season 22, the dancer is expecting her first child with her fiancé, Maksim Chmerkovskiy! She shared the news via Instagram on Wednesday by posting a sweet picture of baby bump along with the caption, "We couldn't be happier ❤️ Baby Chmerkovskiy is coming ❤️" The pair got engaged last December when the Ukraine native got down on one knee, on the dance floor, no less. Looks like they better get some baby dance shoes ready. Congrats to the happy couple!