After having breakfast brought in, the pair got dressed up for their big night out. Murgatroyd showed off her growing baby bump in a sexy crop top and sleek black pant combo, while Chmerkovskiy sported a black button-down shirt, khaki pants and black sneakers.
"Happy birthday @petamurgatroyd ❤," the 36-year-old Ukrainian dancer captioned a couple selfie.
"I can't wait to tell our kids stories about these pictures and I don't know how you manage to get hotter every day, but I am infinitely more attracted to you now then ever before! And 30s are so much better than 20s! Trust me...I know ? #dirtythirtyneverlookedbetter," he added.
The birthday girl shared a photo of herself as well, showing off her bouquet of roses as she gave the perfect side eye to the camera.