The skyrmion^,,,, a vortex-like spin-swirling object, is anticipatedto play a vital role in quantum magneto-transport processes such as the quantum Hall and topological Hall effects^,,. The existence of the magnetic skyrmion crystal (SkX) state was recently verified experimentally for MnSi and Fe_0.5Co_0.5Si by means of small-angle neutron scattering^, and Lorentz transmission electron microscopy. However, to enable the application of such a SkX for spintronic function, materials problems such as a low crystallization temperature and low stability of SkX have to be overcome. Here we report the formation of SkX close to room temperature in thin-films of the helimagnet FeGe. In addition to the magnetic twin structure, we found a magnetic chirality inversion of the SkX across lattice twin boundaries. Furthermore, for thin crystal plates with thicknesses much smaller than the SkX lattice constant (a_s) the two-dimensional SkX is quite stable over a wide range of temperatures and magnetic fields, whereas for quasi-three-dimensional films with thicknesses over a_s the SkX is relatively unstable and observed only around the helical transition temperature. The room-temperature stable SkX state as promised by this study will pave a new path to designing quantum-effect devices based on the controllable skyrmion dynamics.