Mad Men's Vincent Kartheiser and his fiancée, Alexis Bledel, hung out on the beach in Hawaii on Wednesday. Alexis flaunted her diamond engagement ring while she lounged in the sand in a black bikini next to a shirtless Vincent. News of the couple's engagement came out in March following the duo's first official red carpet appearance together in October last year. They got together while working on Mad Men, and though Alexis's guest-starring role didn't last, it looks like their relationship has. The hit AMC show is currently in its sixth season, and with four episodes remaining, there are a lot of questions still left to be answered. Check out the conspiracy theories on the mysterious Bob Benson, and take a look at last week's maddest moments to get ready for a new episode on Sunday night!