Derek Hough 's dream of "little dancing children" is about to come true.

Bindi Irwin’s Dancing With The Stars partner has announced he is expecting his first child. Professional dancer Derek Hough, 40, announced earlier this week that his wife Hayley Erbert Hough was pregnant in a video on Instagram. “We can’t believe the biggest thing to happen to us could be so small,” the caption read.

The 'Dancing with the Stars' judge and his wife announced they are expecting their first baby together on Tuesday, July 22