We introduce the direct light-driven homo-grafting and co-grafting of various functional polymers to graphitic nanodiamonds (grNDs) generated by thermal annealing of detonation nanodiamonds (NDs) via the light-induced photo-enol reaction in only two subsequent reaction steps. For instance, poly(pentafluorostyrene) and poly(N-isopropylacrylamide) were simultaneously co-grafted to NDs in a rapid, facile, catalyst free and modular fashion.