You’ll never guess who I had lunch with Thursday. None other than Chiara Mastroianni, talented actress daughter of Catherine Deneuve and Marcello Mastroianni. She’s in town because her new film, Christophe Honore. “Making Plans for Lena,” in which she portrays a troubled single mom, is screening at the Rendezvous With French Cinema festival. The dark-haired actress — who looks more like her dad than her mom —  said she loved going to movie sets with her parents but doesn’t allow her own two young children.on the set when she’s working. I’ll tell you more about our talk when “Making Plans for Lena” opens later this year.