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Now, 17 years on and Melissa looks almost unrecognisable!
The 28-year-old - who left the soap over 10 years ago - hit the headlines this week after she spoke out about the effects of social media.
In an interview with Closer, Melissa explained celebrities have a responsibility to portray their authentic selves online.
"Let's face it, no one looks perfect all the time and it's damaging to constantly be faking your looks. Friends look at pictures of filtered celebs and say to me, 'But I don't look like that' and I respond, saying, 'No one looks like that.' It's a computer-generated image," she said.
"You have a responsibility to yourself not to constantly touch up imperfections and stay authentic. Otherwise people are constantly striving for something that isn't even real. My mantra is no filter, no judgement, no b******t."
Well said, Melissa!
Melissa - who gave birth to her son, River, in March last year - often opens up about body positivity on social media and sharing the realities of becoming a new mum.
Ten months after welcoming little River, Melissa opened up about the changes within her body and reflected on the idea of body positivity.
"I am body positive. Overall, that much is true. But it can feel toxic sometimes, this message that you must love your body, whatever. I can appreciate my body and all it has given me, while still wanting to better myself," she wrote.
"I can mourn my pre-baby stomach and still be grateful that it grew my baby. I can want to fit back into my favourite pair of jeans without it being because I'm conforming to a beauty standard that is unrealistic or damaging - also, buying new jeans in a pandemic when you can't try them on ohmygod so stressful.
"I can see my body and recognise its worth, but I can also set myself a goal. After all, having a project is good for the soul and the mind.
"Almost 10 months on and I'm still feeling the effects of pregnancy. The stretch marks have faded a little, and genuinely don't bother me anymore. My stomach overhang looks like the side view of a blob fish (yes I did literally draw this onto a photo of my stomach to send to my mate) and has made me laugh and cry in equal measure.
"... But also, my body makes milk that feeds my kid. My body has my brain, which even though it gets fuzzy these days, is creative and quick. My body has travelled, learned, laughed, been put through its paces, danced, and been with me every step of the way."
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