Pittsburgh Ballet Theatre will present its free” Ballet Under the Stars” show at 7:30 p.m. today at Hartwood Acres’ Middle Road performance area in Hampton Township, Allegheny County. PBT will give an evening of mixed repertoire including selections from “The Flower Festival in Genzano,” “Sylvia” and “Chromatic.” Free family activities at 5 p.m. include a ballerina dress-up station, character greetings and photo opportunities, themed crafts and dance activities. There is a fee for the optional dinner. Call 412-454-9137.