13/24) While filming Elf, Will Ferrell developed severe headaches, as he had to actually eat all of the sugar infested foodstuffs in the Elf food pyramid on camera. He also ate the maple syrup covered spaghetti dish for multiple takes.
14/24) He revealed in his reddit AMA that the craziest party he ever went to was at Dave Coulier's house at the height of the popular show Full House.
15/24) While many comedy stars have a strong background in standup comedy, Ferrell's humor is character-driven and his strength lies in his improvised riffs from the minds of his typically cracked characters.
His appearances on talk shows are often awkward as a result, because he says he is uncomfortable appearing in public as himself.
16/24) Nobody in the area was told that Will Ferrell would streak down their street in Old School. One of the storefronts was a 24-hour gym with Stairmasters and treadmills in the window. "I was rehearsing in a robe, and all these people are in the gym, watching me. I asked one of the production assistants, 'Shouldn't we tell them I'm going to be naked?' Sure enough, I dropped my robe and there were shrieks of pure horror. After the first take, nobody was at the window anymore. I took that as a sign of approval."
17/24) For the movie Casa de mi Padre, Will Ferrell spent a month learning and speaking Spanish with a dialect coach for his role.
18/24) During all interviews and promotions for the movie Get Hard, Will Ferrell stayed completely in-character.