“30 Rock” babe and newlywed Katrina Bowden says she’ll legally use her hubby’s last name in her personal life, but keep her stage name for future roles. “I’m old-fashioned,” Bowden, who wed musician Ben Jorgensen in May, told us. “There’s something nice about having your husband’s last name.” She quipped, “Now when I’m flying out of the country, I only have to fill out one Customs card, which is awesome.” She’s next appearing in Dennis Hopper’s final film, “The Last Film Festival.”