Popsugar Entertainment Casting News The Matrix 4 Movie Cast The Matrix 4 Has Some of Your Favourite Stars (and Some New Faces) Taking the Red Pill 11 December 2019 by Mekishana Pierre View On One Page Photo 4 of 7 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 Neil Patrick Harris The How I Met Your Mother star has joined the production in an undisclosed role. Previous Next Start Slideshow Casting NewsThe MatrixMovie CastingMoviesKeanu Reeves