Jennie Anneli Hyun Hee Walldén, formerly Mårtensson, born March 4, 1976, in Gwangju, South Korea, is a Swedish TV chef, restaurateur and cookbook author.

At the age of six, she was adopted by a Swedish family and moved to Kristianstad. Her parents are postal clerk Hans Inge Gunnar Mårtensson (born 1941) and clerk Siv Berit Walldén-Mårtensson (born 1940).

In 2013, she participated in the cooking program Masterchef Sweden on TV4, which she ultimately won. It was her husband who made her apply to the program.

In October 2015, she and her husband started the Korean fusion restaurant Namu in Malmö. As early as 2016, they received a mention in Guide Michelin Nordic Countries and the following year a Bib Gourmand. A Bib Gourmand is an award in the Guide Michelin that shows that it is a restaurant that serves good food at a reasonable price.