2. Arthur in 'Beginners'

Oliver (Ewan McGregor) inherits his father's dog, Arthur (played by 'Hotel for Dogs' alum Cosmo), whose separation anxiety means he can't ever be left at home. So Arthur becomes Oliver's wingman as he meets a beautiful French actress (Melanie Laurent) in this poignant indie about love and loss. Arthur (who speaks in canine subtitles) steals every scene he's in.