"Jared Harris has come aboard full-time for Season 4 It seems that the latest partner at Sterling Cooper Draper Pryce will be sticking around as a series regular next season. Ausiello Files is reporting that Jared Harris has been promoted to a series regular on Mad Men for the upcoming fourth season.

Harris appeared in a guest-starring capacity as Lane Pryce last season, who became a partner in the firm in the Season 3 finale alongside Jon Hamm's Donald Draper, John Slattery's Roger Sterling and Robert Morse's Bertram Cooper.

Mad Men stars Jon Hamm, Elisabeth Moss, Vincent Kartheiser, Christina Hendricks, January Jones, Aaron Staton, Michael Gladis and John Slattery. A premiere date for Season 4 has not been announced as of yet.