Alexis Bledel is now an engaged woman! She and her new fiancé Vincent Kartheiser, her former Mad Men co-star, started dating last year, and now they're getting ready to tie the knot.

"They couldn't be happier... Vincent proposed a few weeks ago. She's been wearing her ring. It's huge", a source told Us Weekly after the news was confirmed. It will be the first marriage for both of them.