Melissa Joan Hart has revealed her 40 lb weight loss in swimsuit pictures.
The 39-year-old actress took to Instagram to thank NutriSystem for helping her shed the weight, as she showed off her new body wearing a green swimsuit in a pool in Miami, while holidaying for her sister's bachelorette party.
Melissa wrote: "Soaking up some sun poolside for my sisters bachelorette in Miami!" she wrote on Instagram. "Thanks @Nutrisystem for helping me stay bathing suit ready! #SummerTime."
The 'Sabrina the Teenage Witch' star - who has three sons Mason, nine, Braydon, seven, and two-year-old Tucker - went on to share more snaps of her dramatic weight loss.
Posing with her friends and wearing a black swimsuit, she wrote: "The #PinkLadies of our #Miami girls weekend! #Bachelorette".
The 'Melissa and Joey' actress previously said that she gained close to 60 lbs while pregnant with Tucker in 2012, and that her desire to feel confident in a bikini really pushed her to make a difference in her lifestyle.
She said: "I just thought, you know, in my 30s, I can't wear a bikini. I just thought, that's not what women in their 30s do and especially after three children. It's never easy when you put on the weight and you're just uncomfortable."
"Just staying in shape and staying fit is so important in my life just because of all the things I wanna do...I'm very proud of myself."