Melissa Joan Hart's post-baby weight loss can be attributed to Nutrisystem, she says ... and she happens to be the newest spokesperson for the company.
"I love working with Nutrisystem," Hart tells ET Online.
"The weight loss program is really delivering results for me and I look forward to long term success, staying motivated and helping others do the same."
The actress welcomed her third child, son Tucker, in 2012 with husband Mark Wilkerson. Since then, the mom to sons Mason, 7, and Brady, 5, has lost 20 pounds.
"She mirrors our values and will resonate with our customers as authentic," Nutrisystem said in a statement of the 36-year-old Melissa & Joey actress.
"Moving forward, you'll see us have an appropriate mix of inspiring celebrities and real life customers alike who have also enjoyed terrific success."
Shortly after welcoming baby Tucker, Hart said she's done her best to be active:
"I know a lot of people with newborn babies that stay at home with the baby."
"Maybe I'm a little selfish but I'm like, 'I want to watch my son at hockey,' so I bundle up the baby and bring him in a car seat and bring him with me."
"I go through the extra effort to be with the older ones too!"