Relive some of the best moments from Know Their Lines featuring Hollywood's biggest stars like Ryan Gosling, Scarlett Johansson, Zac Efron, Willem DaFoe and many more. Watch every 'Know Their Lines' Video from Variety: https://www.youtube.com/playlist?list=PLLx_Nt-I7VirfpEal1AycO4H0yD43vkfa Join Variety to get access to members-only perks: https://www.youtube.com/channel/UCgRQHK8Ttr1j9xCEpCAlgbQ/join Subscribe to Variety on YouTube: http://bit.ly/VarietySubscribe Connect: http://www.facebook.com/variety http://www.instagram.com/variety http://www.twitter.com/variety