Melissa McCarthy shows off 22-kilo weight loss

Melissa McCarthy showed off her 22-kilo weight loss at the South By Southwest festival on March 15. Photo: Getty Images

Melissa McCarthy showed off her impressive weight loss at the premiere of her action film Spy, at the South By Southwest festival in Austin, Texas, over the weekend.

The 44-year-old comedian who has lost 22 kilograms and counting, was clad in a black ensemble from head-to-toe and was beaming as she posed on the red carpet.

RELATED: Melissa McCarthy: 'I've been every size'

The Bridesmaids star is believed to be on a low carb, high protein diet.

"Melissa realised she wasn’t being as healthy as she could be. She wants to set a good example for her kids and she wants to be around to become a grandmother too," s source told Star magazine.

Melissa has opened up about her struggles to lose weight in the past.

Melissa pictured on the red carpet in September 2014. Photo: Getty Images

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"Sometimes I wish I were just magically a size six and I never had to give [my weight] a single thought. It's something I'm always working on," she told Good Housekeeping.

"I don't know why I'm not thinner than I am. I don't really drink soda; I don't have a sweet tooth, and we eat healthfully at home."

Spy hits Australian theaters June 4.

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