Out come the stars in Kenneth Branagh’s Romeo and Juliet. He musters a well-drilled, celebrity-ridden crew but they can’t quite get the rocket off the launchpad. The stylish setting evokes Italy in the early 1950s. The girls wear New Look frocks and the boys sport tight slacks and shirtsleeves. Christopher Oram’s muted set has bland marble walls and tasteless squared-off pillars like a modern dictator’s palace on the Euphrates.