Last week, an Australian magazine claimed that Harry, 30, and Watson, 24, had been secretly dating. However, the actress shot down the rumors on Sunday.
"WORLD," she Tweeted. "Remember that little talk we had about not believing everything written in the media?!"
Palace officials, meanwhile, have not directly addressed the reports, although a source told PEOPLE that the dating rumor was "nonsense."
Watson split from her Oxford University rugby player beau, Matthew Janney, in November 2014. Meanwhile, Harry ended things with Cressida Bonas back in April 2014.
While the Internet heartily approved of the thought of the Harry Potter star and women's rights activist dating a royal, it looks like the report was just too good to be true.
WORLD ♥ Remember that little talk we had about not believing everything written in the media?!— Emma Watson (@EmWatson) February 22, 2015
Reporting by Philip Boucher