Kate Upton and Justin Verlander are engaged, and it was very obvious at the Met Gala red carpet because her left hand was weighted down by a gigantic diamond. Upton has been dating the starting pitcher for the Detroit Tigers for three years. They've both been on the cover of Sports Illustrated, but only one of them wore a bikini. 

Here's Upton blinding photographers with that monster diamond:

Sources: E! | ESPN