Rebel Wilson has taken to Instagram to show off her stunning weight loss in a new selfie.

This comes after Wilson said that she feels the need to "physically transform" so people can imagine her in serious acting roles.

Wilson became a household name after portraying "Fat Amy" in Pitch Perfect, however, as she entered her forties, she decided that it was time to focus on her health.

The Australian actor took to social media in January to reveal that 2020 would be her "Year of Health", and that she would be stepping up her exercise regimen and cutting down on "the sugar and junk food" as part of "some positive changes".

[[imagecaption|| Credit: PA]]

Wilson is believed to have lost 2st 8lbs (40lbs or 18kg), with an overall goal weight of 11st 8lb (75kg or 165lb).

Now, in a series of snaps posted to Instagram today (25th August), Wilson can be seen showing off her physique.

"First ever surf lesson in Malibu. Thanks to my ‘BU crew for having my back and teaching me the way of the waves x," she captioned the pictures.

[[instagramwidget||https://www.instagram.com/p/CETRFfOpWl6/]]

However, in a recent interview, Wilsom disclosed that the weight loss wasn't just for herself.

Speaking to The Express, Wilson stated she "literally feels as if she has to physically transform" so that people can see her as something other than a comedic actor.

[[instagramwidget||https://www.instagram.com/p/CC1zyV9JqpD/]]

"For some reason, even though we’re in a very imaginative industry, it’s very difficult for people to imagine me as a serious actress and I feel that I physically have to show you that I am different," she said. "I am somewhat transforming myself in order to help transform my career. I still love comedy and I will obviously still work in the comedy space, but I did train originally as a dramatic actress… which people forget."

Rebel Wilson shows off stunning 18kg weight loss in skintight wetsuit