The present invention relates to biaxially stretched article obtained by stretching a thermoplastic composition in a machine direction and a transverse direction at elevated temperature, said thermoplastic composition comprising: —a polyolefin phase containing at least one polyolefin, —a starch phase containing thermoplastic starch, —at least one compatibilizer selected from the group consisting of ethylene vinyl alcohol copolymers, block saponified polyvinyl acetate and random terpolymers of ethylene, butylacrylate and maleic anhydride, wherein the total of the at least one polyolefin, the thermoplastic starch and the at least one compatibilizer is more than 80 wt % of the weight of the thermoplastic composition and wherein the article has a layered morphology with alternating layers of starch phase and polyolefin phase, said layers of starch phase and polyolefin phase extending in machine direction and transverse direction.