Asa Butterfield, Harrison Ford, Viola Davis, Ben Kingsley, Hailee Steinfeld, Abigail Breslin
For a movie with as long a production history as Ender's Game, the finished product feels rushed. Like too many science fiction films and novels, there's far too much exposition to get through before the real story grips us.
To sum what the movie takes ages to tell is that an alien race tried to take over Earth. They were defeated and sent packing to their home world. But now the international armies recruit preteens to become commanders should the aliens return.