The model posed on a balcony in Miami wearing a stunning red suit in the photo. She used the hashtag #PregnantinMiami.
No word on when the tiny slugger is due.
The proud father-to-be praised his wife in a follow-up social media post. In it, the Houston Astros' pitcher said in part, "I'm so proud that our little one is going to be raised in this world by a woman like you!"
Fans can grab their own mini-Verlander Saturday at the Astros' home game since it is fittingly Verlander bobblehead night.
Take a look at Justin Verlander and Kate Upton's fairytale relationship.
- Justin Verlander proposed before the baseball season started in 2016
- Justin designed Kate's engagement ring
- They dated three years before their engagement
- Kate sits in the luxury boxes with Justin's family to cheer him on
- Kate got a custom jacket to root on Verlander
- Both dog lovers, the couple has a rescue boxer called Harley Upton
- Both support the charitable organization K9s For Warriors
- The couple once dressed up as Danny and Sandy from Grease
- Kate refers to Justin as her best friend
RELATED: Kate Upton shares details of fairytale Italian wedding to Justin Verlander