(LOS ANGELES) -- It’s a match made on Mad Men.

Mad Men co-stars Alexis Bledel, 31, and Vincent Kartheiser, 33, are taking their on-screen passion off screen. The two, who went public with their romance last October, are engaged, a representative for the actress confirmed to ABC News Radio.

On the juicy AMC drama, Bledel plays Beth Dawes, who seduces Kartheiser’s character, Pete Campbell, into a steamy affair.

This will be the first marriage for both stars. Kartheiser previously dated actress Rachael Leigh Cook and Bledel dated her Gilmore Girls co-star Milo Ventimiglia for more than three years.

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