Not to spoil things for you, but the top three actors on this list all made the bulk of their money from participating in the same franchise. The eight Harry Potter films grossed $2.39 billion domestically as fans of the uber-popular novels swarmed theaters for the film adaptations. The highest-grossing of those films was the very last installment, Harry Potter and the Deathly Hallows: Part 2, which made $381 million during its time in theaters and is the 20th highest-grossing film of all time domestically. In Harry Potter, Rupert Grint played Harry’s redheaded best friend Ron Weasley. The actor has only made three other films outside the franchise, all small independent features that didn’t come anywhere near grossing what the Harry Potter movies did, but his earnings from Potter are enough to place him 36th on the complete list. Grint’s 13 movies have made an average of $183.9 million a pop.