Harry Potter is a star of the amazing film series Harry Potter. Harry studies at the Hogwarts School of Wizardry where Professor Snape and other Professors teach him all kinds of spells. And Expelliarmus is the first spell we see in the move used by Professor Snape on Professor Lockheart, disarming him and throwing him back to the end of the platform. The Expelliarmus magic spell becomes Harry Potters signature spell. A fanart Harry Potter custom progress bar for YouTube with Harry Potter casting the Expelliarmus magic spell.