Josh Hutcherson: Filming RV was so much fun. We had an amazing cast! We all got along so well, and since it was on location, we all did tons of stuff together away from the set and became great friends. Working with Robin [Williams] is like watching him do stand-up constantly! It was so unbelievable to watch him do amazing improv. What was fun was getting to improv along with him because I love to do that, and the fact that I got to do it with Robin Williams still blows my mind.