{Reference Type}: Journal Article {Title}: A Review on Green Synthesis, Characterization and Anticancer Application of Metallic Nanoparticles. {Author}: Thakur PK;Verma V; {Journal}: Appl Biochem Biotechnol {Volume}: 193 {Issue}: 7 {Year}: Jul 2021 {Factor}: 3.094 {DOI}: 10.1007/s12010-021-03598-6 {Abstract}: Cancer is one of the leading causes of death worldwide and also the main obstacle of accelerating anticipation. It is globally recognized as overwhelmingly challenging in terms of clinical management. Cancer is taken into account because a prime lethal disease affects different organs of the body. Even with the rapid improvements in the medical sciences, there are no proper medicines to treat specific kinds of cancer. One of the fundamental issues within the malignant growth treatment is the side effect because of conventional treatment systems. Nanotechnology might be an extremely encouraging field for the therapeutic and drug areas; thus, it assumes a crucial part in improving humankind's satisfaction. In the infield of nanotechnology, a plant-mediated fusion of metal nanoparticles has been developed as a substitute to defeat the limitations of traditional synthesis approaches similar to physical and synthetic strategies. These tunable properties of nanomaterials make them progressed apparatuses in the biomedical platform particularly for the improvement of new diagnostics and focused on therapeutics for malignancy.This review incorporates the characterization of nanoparticles with size and shape and features critical uses of biosynthesized green nanomaterials in cancer theranostics.