Jean Nidetch Founder of Weight Watchers | HealthmadJean Nidetch founded Weight Watchers fifty years ago and still basically follows the plan, but at age 87 she does make some allowances. When she moved to Florida a few years ago she got a lot of attention from the residents, and takes pride in the attention. It all comes from something she is rightly proud of. She was over weight from a young age until she was 38. At that time she learned the secret to losing weight and as a result founded Weight Watchers.