By Zachary Fagenson MIAMI (Reuters) – The 91-year-old founder of weight loss company Weight Watchers International Inc., Jean Nidetch, died of natural causes early on Wednesday, a company spokeswoman said. “The first official Weight Watchers meeting was actually over a movie theater in Queens,” former CEO David Kirchoff told CNN in a 2013 interview. Singer Jennifer Hudson and former professional basketball player Charles Barkley were among the millions of members who shed pounds through the program. Weight Watchers was purchased by H.J. Heinz Company in 1978.