Max Greenfield is an actor most known for his work on TV, but is also known for his voice acting, having voiced Roger in the Ice Age franchise. Now he?ll be portraying David in the upcoming film adaptation of Jeannette Walls? memoir, The Glass Castle. Screen Rant got a chance to talk with Max Greenfield on press day asking him what his character learned from Jeanette. Greenfield responds, "I think he takes liberty. I think, you know, in the first scene you see him taking his liberties when she is more averse to it."