Kate Upton shows off her huge engagement ring at the MET Gala

Los Angeles - Kate Upton is engaged!

The 23-year-old beauty showed off her stunning diamond ring at the Met Gala in New York on Monday night, and admitted baseball player Justin Verlander - who she has been dating for over three years - actually popped the question over a month ago.

She told E! News: "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."

Justin - who signed a $180m contract with the Detroit Tigers in 2013 - designed the huge sparkler himself for his new fiancée.

And while the pair are very happy together, Kate insists they are in no rush to tie the knot. She said: "We are enjoying the engagement period for now."

See the pics here:

(Photos: Getty Images)