The Sports Illustrated cover girl took to Instagram to reveal she is expecting her first child with her husband, baseball player Justin Verlander.
"She dropped a simple hashtag "#PregnantinMiami", and a photo of herself wearing a red suit with a tiny baby bump.
Verlander reposted the same picture of his wife on his Instagram with a loving message.
And you know, that's probably where Justin first heard the news, too!
"You're going to be the most awesome Mum", he wrote.
Upton and Verlander have been together for five years, and got engaged in early 2016.
Eight months after tying the knot with husband Justin Verlander in a fairytale wedding in Italy in November, the couple is preparing for a baby. I'm so proud that our little one is going to be raised in this world by a woman like you! I love you so much.
Kate also recently landed the top spot on the Maxim Hot 100 list.
The unbelievable news comes eight months after Kate and Justin surprised everyone and got married in November 2017 just two days after Justin and the Astros won the World Series.