Millets are an abundant source of micronutrients with great variability and are known as Miracle Grains/Nutri-cereals. Biofortification by plant growth promoting bacteria in millet cultivars with increased levels of iron (Fe) and zinc (Zn) can significantly reduce the prevalence of their deficiencies which are common in developing countries that rely mostly on cereals for their nutritional needs and dietary energy. This paper reviews the importance of PGPR in enhancing the availability of zinc and iron in millets through mineral solubilization via siderophore production. This results in acidification of soil by releasing organic acids that binds to cations thus making them available to the plant.