Happy birthday Will Ferrell! 🎉 Reese Witherspoon celebrated the legend's 59th by sharing an adorable video of the pair dancing, calling him a "true comedic genius" ❤️ The duo have been in each other's lives for over 20 years - first meeting on SNL in 2001 ✨ 📽️ : #ReeseWitherspoon #WillFerrell #Birthday