'I've already dropped 20lbs!' Melissa Joan Hart is unveiled as the new face of weight loss company Nutrisystem

PUBLISHED: 05:52 EST, 3 April 2013 | UPDATED: 07:16 EST, 3 April 2013

As any new mother knows, losing weight after having a baby can be a challenge.

But mother-of-three Melissa Joan Hart has credited weight loss company Nutrisystem for helping her drop 20lbs.

Indeed, the product is so successful that Melissa has signed up as the new spokesperson for Nutrisystem.

Working already: Melissa Joan Hart has already lost 20lbs with Nutrisystem, and showed off the preliminary results of the diet at The Incredible Burt Wonderstone premiere in March

As she was: Melissa has three children with husband Mark Wilkerson

Melissa, who gave birth to son Tucker in September, said of the partnership: 'I love working with Nutrisystem.

'The Program is really delivering results for me and I look forward to long term success, staying motivated and helping others do the same.'

Melissa also voiced her praise for Nutrisystem via Twitter, writing: 'Shortly after welcoming baby Tucker, Hart told Us Weekly that she was staying active after giving birth by I'm losing weight & feeling gr8 w/ Nutrisystem already. It's perfect 4 me. I'm so excited 2 B part of the @Nutrisystem family! #bodyafterbaby.'

Keira Krausz, Nutrisystem’s Chief Marketing Officer, added: 'We are thrilled to be helping and working with Melissa. 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.'

Speaking recently about her post-baby body, Melissa said that looking after Tucker, as well as her two older sons, seven-year-old Mason and five-year-old Braydon, helps her stay active.

She said: '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!'

Nutrisystem is delivery service featuring over 100 meal options providing an average of 1,250 calories per day for women, and 1,500 calories per day for men.

Those following the plan can expect to lose around 1 to 2lbs per week. Previous celebrity spokespersons for the company have included Janet Jackson and Marie Osmond.

Delicious meal options: Those who follow the Nutrisystem diet can expect to lose between 1 and 2lbs per week

Growing brood: Melissa and Mark with sons Mason and Braydon

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Comments (9)

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1-2lbs per week. Speak for yourself.

- LiveWell , Dublin, Ireland, 03/4/2013 13:04

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Her little boys are soo cute & beautifully turned out! Lovely to see that.

- Clarabelle , London., United Kingdom, 03/4/2013 13:01

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She looks great! She has barely even aged since Sabrina The Teenage Witch days...

- danielle279 , London, United Kingdom, 03/4/2013 12:56

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20 pounds in 6 months is actually not that great if you are seriously dieting .... with the help of a free app on my phone I've been losing the recommended 2 lb a week .... so 6 months is approx 24 weeks which equates to 48 pounds lost (in total over the last 20 months, I've lost 8 stone so far!) .... don't waste money on fad schemes when you can do the same thing for free and use the money to make much tastier meals yourself!

- Frustrated , Oxford, 03/4/2013 12:56

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WHO? - lol I've always wanted to write that :-)

- KROHEAD , London, 03/4/2013 12:49

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her hubby is fit yummy!

- su , dudley, 03/4/2013 12:46

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Sabrina The Teenage Witch grew up...

- Grumpy Woman , Hertfordshire, United Kingdom, 03/4/2013 12:45

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Hope the same does not happen to her as to Pauline Quirke, who seems to have gone from completely in our faces to disappearing completely.Love it when celebs 'endorse' diet systems, they do not have to cough up megabucks for them.

- andi , margate, 03/4/2013 12:43

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Gorgeous family :)

- Shellshocked , Glasgow, 03/4/2013 12:31

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