Lightweighting of automobiles is possible through the application of materials such as advanced high strength steels and low density alloys including Al and Mg alloys. Mg alloys having a density about one-fourth of steel and two-thirds of Al can offer greater weight reduction over other materials, provided that Mg alloys have comparable properties to those of steels and Al alloys. The use of large amounts of Mg alloys in automobiles has been frequently predicted, but their actual application, particularly of wrought products, is quite limited, due to their several shortcomings such as high cost, poor mechanical properties including formability, poor corrosion resistance, etc. The widespread application of wrought Mg alloys in automobiles depends on how these challenges are addressed. At present, several countries are actively pursuing the R&D to overcome these challenges and the present talk discusses the Korea's R&D activities towards the applications of wrought Mg alloys in automobiles.