Congrats are in order for model Paulina Gretzky and pro golfer Dustin Johnson!

The engaged couple is expecting their second child. Paulina, 28, revealed the news on Instagram Saturday, posting a pic of her sitting cross-legged on a bed near the couple's pet dog, wearing a tight nude off-the-shoulder sweater and rubbing her baby bump while holding a ultrasound photo.

"Coming soon..." she wrote.