Alexis Bledel will be hearing wedding bells in the near future…

The 31-year-old half-Argentinian actress, best known for her role as Rory Gilmore on the Gilmore Girls, and her Mad Men co-star Vincent Kartheiser are officially engaged, according to TVGuide.com.

Bledel and her 33-year-old fiancé began dating when she portrayed his on-screen mistress on the hit AMC series last season.

This will be the first marriage for both.

Bledel, who just signed on to star in Fox’s comedy pilot Friends & Family, walked the red carpet in style at the SAG Awards with Kartheiser earlier this year.

No word yet on a wedding date.