Prized for his colorful, globe-trotting style, the designer is to show his first collection for the French brand next January.
Madewell continues to show gains while comp sales at the J. Crew brand remained challenged.
He is cited for his background in luxury and long experience in Asia.
The brand, which features product expiration dates on its packaging, recently rolled out in Canada and New Zealand.
The business is approaching $50 million in sales, according to industry sources.
Jason Wu designed a limited-edition Caudalie Beauty Elixir.
La Prairie is adding Skin Caviar Essence-in-Lotion to its best-selling Skin Caviar range.