07/07/2011 06:31 pm ET | Updated Sep 06, 2011

Harry Potter Stars: Then And Now (PHOTOS)

It's been nearly ten years since Emma Watson, Daniel Radcliffe and Rupert Grint arrived at the very first premiere for 'Harry Potter and the Sorcerer's Stone' and what a difference a decade makes.

As the three stars stepped onto the red carpet in London's Trafalagar Square earlier today for the UK premiere of 'Harry Potter and the Deathly Hallows, Part 2' it became clear these actors are children no more. The trio have grown up in front of the cameras and have transformed from starry-eyed kids to full blown superstars.

For Watson, long gone are the days of Hermoine Granger's sharp tongued dialogue and frizzy hair, not to mention her own more modest fashion sense. She has blossomed into a fashion-minded, 21-year-old ready to take the world by storm. To say her style has changed since that very first premiere would be quite an understatement.

With a weepy voice, Watson spoke to the thousands of fans who filled Trafalagar Square for the premiere, thanking her co-stars for their time spent over the last ten years and calling Radcliffe "the perfect Harry."

All three stars have made such a dramatic changes over the years, take a trip down memory lane and see the stars then and now.

Then ...

Now ...