We all know that TV shows and movies tend to cast people way out of the age range of their characters. This is especially true when it comes to casting older actors as high school kids. Perhaps those actors are more mature, and perhaps the rest of the cast and crew don't have to deal with child labor laws. Whatever the reason, TV and movies have done it time and time again.
Ready for a walk down memory lane? Then check out this gallery to see which actors were way too old for their roles.