Mentions of science fiction will generally conjure up all manner of otherworldly imagery in the mind's eye: space-faring adventures across the stars or rain-soaked dystopias filled with cyborgs. Sci-fi films are often known for their visuals, but they can also provide opportunities for actors to explore new worlds. Whether as part of some intergalactic epic or the lead of something smaller and more character-driven, there has been no shortage of fine performances recorded in the 21st century in some of its best sci-fi movies.