PopSugar has emailed to let us know about a fun new video they have: Harry Potter Cast Secrets – 10 Things You May Not Know. In the video they feature 10 facts about the Potter stars that many people don’t know.  This segment features facts about Daniel Radcliffe, Emma Watson and Rupert Grint.  Of course, hardcore fans will already know all these facts, but for those of you who are new fans you can learn some fun news.