Diet company Nutrisystem today announced that actress Melissa Joan Hart has signed on as the “brand ambassador” for the diet system.

Hart rose to fame in the early 90s in her role as Melissa Darling on the Nickelodeon TV show Clarissa Explains it All. She went on to play Sabrina Spellman in the long-running ABC TV series Sabrina the Teenage Witch. She currently stars in the ABC Family TV series Melissa & Joey.

“I love working with Nutrisystem,” said Hart. “The Program is really delivering results for me and I look forward to long term success, staying motivated and helping others do the same.”

Hart gave birth to her third son with husband mark Wilkerson last September. She has also written a memoir titled Melissa Explains It All: Tales from My Abnormally Normal Life, which is scheduled to be published in October 2013.

Nutrisystem in a statement claimed that Hart has lost twenty pounds on the company’s diet.

“We are thrilled to be helping and working with Melissa,” said Keira Krausz, CMO at Nutrisystem. “She mirrors our values and will resonate with our customers as authentic. Moving forward, you’ll see us have an appropriate mix of inspiring celebrities and real life customers who have also enjoyed success. We think dieters are savvier than ever and really appreciate someone who – above all else – is relatable.”