Popsugar Entertainment Cats Movie Cats Movie Cast Side by Side With Their Characters Here's What the Cats Movie Cast Looks Like in and Out of Costume 24 December 2019 by Kelsie Gibson View On One Page Photo 2 of 15 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Ian McKellen as Gus the Theatre Cat Previous Next Start Slideshow Cats MovieMovie CastingMoviesTaylor Swift