In this talk I will give an overview of different classes of composites we produce using graphene, the newest and most promising among carbon-based materials. While the application of graphene multilayers in structural composites (eg as nano-additive in bulk polymers for mechanics) is already being pursued at industrial level, an even greater impact is expected in functional composites, where graphene can act as a conductive, flexible and robust nanoscale scaffold to be complemented with other materials. Graphene surface can be functionalized with organic molecules to tune its optoelectronic properties, for applications in flexible electronics and sensing. Conversely, it can be functionalized with inorganic materials (Fe2O3, TiO2, SiO2, Au, Sn or Pt nanoparticles, etc.) to act as a highly porous, conductive scaffold in electrodes for batteries and supercapacitors, in catalysts and fuel cells. Due to its 2-dimensional shape, it shall interact in peculiar ways with the cellular membrane and be used to create particular bio-composites, as example to foster cellular growth and differentiation.Overall, the interesting potential applications of graphene are due to its truly 2D shape, its large availability in nature, its different possible sources for large scale production, and the huge amount of synthetic tools that we can have ready to use from organic synthesis, to play with graphene and transform it in the way we want. Graphene-based composites are currently the only application of graphene already commercialized on large scale. The number of products containing these composites is increasing continuously, from tennis rackets to bicycles, to skis. However …