Chinese celebrity Andy Lau was crowned the Shanghai World Expo's Goodwill Ambassador on Friday, as the highly anticipated international event is 50 days away, Xinhua reported.

Three other household names also joined the ambassador list. Renowned anchorwoman Yang Lan was appointed the Expo's Image Ambassador, composer Tan Dun the Culture Ambassador, and athlete-turned-entrepreneur Li Ning the Health Ambassador.

The four, together with three previously appointed ambassadors?- Chinese Kung Fu actor Jackie Chan, basketball player Yao Ming and master pianist Lang Lang?- will help promote the international event in Shanghai, which starts May 1 and goes through Oct 31.