A metal-coated multilayer mirror having high reflectivity and high specularity. The mirror comprises a multilayered polymer film (10) and a reflective metal layer. The multilayered polymer film preferably comprises layers of a crystalline, semi-crystalline or liquid crystalline material, such as a naphthalene dicarboxylic acid polyester (12), having an average thickness of not more than 0.5 microns and layers of a second polymer (14) having an average thickness of not more than 0.5 microns. Preferably, the layers of semi-crystalline naphthalene dicarboxylic acid polyester have a stress optical coefficient. The reflective metal layer comprises a metal selected from the group consisting of silver, gold, aluminium, nickel, copper, titanium, with silver and aluminium being particularly preferred. The metal-coated multilayer mirrors are useful in applications requiring broad bandwidth reflection, high specularity, low manufacturing costs, high reflectivity.