The "Mad Men" stars have been dating since 2012 and they tied the knot at the Ojai Rolling Thunder Ranch in front of family members and famous friends, including Jon Hamm and show creator Matthew Weiner, according to Star magazine.
A sources tells the publication, "Alexis looked breathtaking. She wore a floor-length gown, and her hair was up. Vincent wore a grey suit and teared up when Alexis walked down the aisle."
This is the first marriage for the couple, who announced their engagement in March 2013.
A representative for Bledel did not return WENN's request for confirmation.
The 34-year-old Kartheiser plays ad man Pete Campbell on the hit AMC network drama "Mad Men." Bledel, 32, who has a recurring role on "Mad Men" as Beth Dawes, is best known for her role as the teenage daughter in the long-running series "Gilmore Girls."