  The Cherenkov Telescope Array (CTA) is the next generation very high-energy
gamma-ray observatory, with at least 10 times higher sensitivity than current
instruments. CTA will comprise several tens of Imaging Atmospheric Cherenkov
Telescopes (IACTs) operated in array-mode and divided into three size classes:
large, medium and small telescopes. The total reflective surface could be up to
10,000 m2 requiring unprecedented technological efforts. The properties of the
reflector directly influence the telescope performance and thus constitute a
fundamental ingredient to improve and maintain the sensitivity. The R&D status
of lightweight, reliable and cost-effective mirror facets for the CTA telescope
reflectors for the different classes of telescopes is reviewed in this paper.
