We’ve heard that the American Repertory Theater is close to announcing the cast of its world premiere production of Eve Ensler’s “O.P.C.” (Obsessive Political Correctness), and it looks to include an Oscar-winner, the dad on “7th Heaven,” and Juno’s best friend. Melissa Leo, who won an Academy Award for “The Fighter”; Stephen Collins, a.k.a. the Rev. Eric Camden on the TV series “7th Heaven”; and Olivia Thirlby, of “Juno” and “Bored to Death,” will star in the play, which is about a mother running for the US Senate whose daughter is an apartment-squatting dumpster diver. “O.P.C.” will be directed by Pesha Rudnick and will run at the ART from Nov. 28 through Jan. 4. Ensler is best known for “The Vagina Monologues.”Names can be reached at email@example.com. Follow Mark Shanahan on Twitter @MarkAShanahan. Follow Meredith Goldstein on Twitter @MeredithGoldste.