While Amy Poehler, Jessica Alba, and Adam Scott were in Los Angeles promoting their new comedy “A.C.O.D.” (Adult Children of Divorce), their costar Richard Jenkins was at home in Rhode Island. That’s where the actor likes to be — and lately, he’s home a lot. “It’s great,” Jenkins said, of his latest project, the HBO miniseries “Olive Kitteridge,” which has him filming on the North Shore. “I get to come home on the weekends.” Jenkins, whose resume includes “Six Feet Under,” “Step Brothers,” and “The Visitor” (for which he earned an Oscar nomination), hasn’t been able to do much promotion for “A.C.O.D.” because of the “Olive Kitteridge” filming schedule. When we spoke to him by phone about the movie — which will be released on Friday — he seemed a bit homesick for the cast. “I love Catherine O’Hara. I just adore her.” he said. “And I’d never worked with Amy Poehler. It’s such a great group.” O’Hara plays Jenkins’s ex-wife in the film, Poehler plays his current wife, and Scott, who also starred with Jenkins in “Step Brothers,” plays his son Carter, who’s still coping with the effects of his parents’ divorce. In “Kitteridge,” Jenkins plays Henry Kitteridge opposite Frances McDormand’s Olive. He said the North Shore residents have been welcoming, and that he’s never had a problem filming on location. “People everywhere — they’re excited to have you there . . . until you mess up the traffic,” he joked. Jenkins will also be able to stay local when he and his wife, Sharon, codirect Trinity Repertory Company’s production of “Oliver” later this season. Jenkins was the Providence theater company’s artistic director from 1990 to 1994.