The 23-year-old beauty showed off her stunning diamond ring at the Met Gala in New York, and said baseball player Justin Verlander, who she has been dating for over three years, actually popped the question over a month ago.
"He asked me right before the season started, so we've been keeping it on the down low for quite a while, so I'm excited to finally be able to share it with the world," Kate said.
Justin, 33, designed the huge sparkler himself for his new fiancee, and while the pair are very happy together, Kate insists they are in no rush to tie the knot.