Elf is considered by many to be one of the best Christmas movies of all time (it’s even Prince William’s favorite). Will Ferrell is absolutely hilarious as Buddy, a human who was raised by elves. It’s such a classic that you’d never think there was tension behind the scenes between Ferrell and director Jon Favreau. Rumors have persisted over the years, and the Old School star has spoken out to explain what actually happened.