Vincent Kartheiser and Alexis Bledel of Mad Men

Character names: Pete Cambell & Beth Dawes
Years dated in real life: 6 months

On AMC's award-winning office drama Mad Men, Vincent Kartheiser plays Pete Cambell, a brash young ad man with a penchant for women other than his wife. One of the women with whom Pete has had a tryst with is Beth Dawes, a naughty housewife played by the former Rory Gilmore, Alexis Bledel. In the real world, these two have been dating for a few months, and with one look at Alexis, it's obvious to see why Vincent's not a mad man in real life.