NEW YORK (AP) - Weight Watchers is getting another boost from Oprah Winfrey.

NEW YORK (AP) Weight Watchers is getting another boost from Oprah Winfrey.

The weight loss company's shares are soaring as a TV commercial starring Winfrey begins to air.

The commercial shows past videos of Winfrey working out and referencing her struggle with weight, a frequent topic of Winfrey's former talk show. The ad ends with Winfrey asking viewers if they're ready to join her.

She tweeted the ad to her more than 30 million followers on Tuesday.

Weight Watchers stock has more than tripled since October when Winfrey bought a 10 percent stake in the New York company. Besides the new ads, Weight Watchers has also made changes to its plans to better fit in with Winfrey's message of living a healthy and happier life and not just focusing on weight loss.