Harriet Brookes, posted screenshots from Wikipedia and pictures of Madeleine McCann, and said that the two shared a distinctive brown spot in their eyes.
She posted, 'Right guys. I don’t usually believe in conspiracy theories but honestly I think I'm Madeleine McCann.'
She then posted a picture of her eye and leg calling them 'Exhibit A' and 'Exhibit B.'
Maddie disappeared while on a family holiday in Portugal in 2007 when she was just three-years-old.
That would make her 14-year-old today, unlike Harriet Brookes.
Thousands of people have flooded Twitter to slam Ms Brookes for 'mocking' the tragic situation.
The student has since tweeted that stories published by The Daily Mail UK and The Sun were printed 'without her permission.'
'It was supposed to be a private conversation between five people not for the entire world to give their opinion on,' she said.
The search continues for the missing girl, with more than A$19 million spent on the investigation so far.