T he Harry Potter franchise is one of history's most successful film franchises, having spawned not only movies but also ...

I solemnly swear that I am up to no good. This line has since become a classic, being plastered on everything from t-shirts to cups and just about every other bit of merchandise the Harry Potter ...

74. “I solemnly swear that I am up to no good.” —The Marauder’s Map, Harry Potter and the Prisoner of Azkaban (and beyond). Though no character technically says this organically ...