We present recent results on light mesons based on Dalitz plot analyses of charm decays from Fermilab experiment E791. Scalar mesons are found to have large contributions to the decays studied,D+→ K−&pgr;+&pgr;+andD+,Ds+ → &pgr;−&pgr;+&pgr;+. From theK&pgr;&pgr; final state, we find good evidence for the existence of the light and broad &kgr; meson and we measure its mass and width. We also discuss recently published results on the 3&pgr; final states, especially the measurement of thef0parameters and the evidence for the &sgr; meson fromD+→ &sgr;&pgr;+. These results demonstrate the importance of charm decays as a new environment for the study of light meson physics. © 2002 American Institute of Physics