Get ready to feel old -- because today, Emma Watson turns 21!

Watson, who got her big start in the first "Harry Potter" movie as Hermione Granger when she was only 10, has gone from innocent ingenue to full-fledged fashionista in front of our very eyes.

Check out her style evolution in the gallery above.

Emma took to her Facebook this morning to send a message to her fans, telling them: "Just a quick message to say thank you for all the Birthday wishes and gifts you’ve sent. I’m continually overwhelmed by the support from you all. It means so much to me, so thank you very much.

She continues, "Turning 21 is a significant occasion for everyone, and it’s proved to be quite a milestone ... On my Birthday I look forward to spending some time with my friends and family. Once again, thank you so much for all your support."

She also filmed a video message, watch that below:


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