I really love this little clip from Solaris. There is so much emotion being conveyed from the eyes. There's also some awesome subtle mouth movements going on at the end. They say the eyes are the window to the soul, so don't forget to make their movements have meaning. Also a big fan of Natascha McElhone, she's a great underrated actress.
Acting Reference #18 from Kyle Kenworthy on Vimeo.