Already much praised and Oscar-nominated for best picture, Lady Bird looks an unexceptional creature at first sight. What else should a coming-of-age movie include but mother and daughter fights, problems at school, a yearning for elsewhere, teenage strops, high–school bops, the crushes, the heartaches, the lessons in wisdom? But what first-time director Greta Gerwig has done, wonderfully at times, is to remake the old in a new way. An actress and writer, Gerwig (Frances Ha, Mistress America) has leafed through her own back pages for inspiration, but applied to them a freshness of detail and a bitter-sweet sensibility. Her film has a bounce in its stride.