Melissa Joan Hart's 20-Pound Weight Loss: Actress Named New Nutrisystem Spokeswoman

"I look forward to long-term success," the actress said in a statement

Melissa Joan Hart is finally sharing the secret to her slim post-baby bod!

The 36-year-old mother of three has been announced as the new Nutrisystem spokeswoman, and the former Sabrina, the Teenage Witch star reveals she's already lost 20 pounds on the diet plan since giving birth to her third child in September. 

"I love working with Nutrisystem," the actress—who currently stars on the hit ABC comedy Melissa & Joey—said in a statement to ET Online. "The program is really delivering results for me and I look forward to long-term success, staying motivated and helping others do the same." 

The weight loss company also said it is "thrilled to be helping and working with Melissa" and explained why Hart is a perfect fit for the brand:

"She mirrors our values and will resonate with our customers as authentic," Nutrisystem announced. "Moving forward, you'll see us have an appropriate mix of inspiring celebrities and real life customers who have also enjoyed success."

Hart is hardly the first celebrity to endorse the diet plan. Marie Osmond, Tori Spelling, Danielle Fishel and more have all achieved weight loss success with the program.