The Grinch - watch online: streaming, buy or rent
Currently you are able to watch "The Grinch" streaming on iflix. It is also possible to buy "The Grinch" on Apple TV as download or rent it on Apple TV online.
There aren't any free streaming options for The Grinch right now. If you want know when it is streaming for free, click 'Free' in the filters above and hit the notification bell.