Life imitates pillow talk: Vincent Kartheiser and now-fiancee Alexis Bledel in a scene from "Mad Men."

Looks like Vincent Kartheiser's been up to a lot more than growing his sideburns and widening his lapels for Season 6 of "Mad Men." The Minneapolis-raised actor, who plays weasely social-climbing adman Pete Campbell on the hit AMC series, is engaged to Alexis Bledel, the former Gilmore Girl who guest-starred as a bored suburban housewife with whom Pete had an affair last season.

Bledel played Beth Dawes, the timid wife of a bombastic commuting buddy of Pete's. Following electroshock therapy, she can't remember him, much to this devastation. Clearly he made a stronger impression in real life.

The couple has been an item for about a year, and first appeared together on the red carpet last October. It will be the first marriage for both. The pair is shockingly close in age for Hollywood -- he's 33, she's 31.

Kartheiser may play a callous creep to chilling perfection, but IW hears he is the most decent and down-to-earth of fellows. In other words, worthy of the hand of who we can't help thinking of as our lil' Lorelai Gilmore.

By the by, Bledel bears at least a passing resemblance to Kartheiser's old flame, actress and fellow former Minnesotan Rachael Leigh Cook. And now, here's an excuse to run a "Mad Men" Season 6 promo pic, so you can get a load of those sideburns (and thinning hairline).Here, left to right, are John Slattery as Roger Sterling, Jon Hamm as Don Draper, Christina Hendricks as an extra in "Cleopatra," I mean Joan Holloway, and Kartheiser as Campbell.