The Grinch who stole Christmas is a fictional character created by Dr. Seuss, and his exact age is not specified in the book or any of the subsequent adaptations. However, it is generally assumed that the Grinch is an elderly character who has lived for a long time, but his exact age is not specified. In the 2000 movie adaptation, the Grinch was portrayed as a middle-aged character by Jim Carrey, while in the 2018 movie adaptation, Benedict Cumberbatch portrayed a younger Grinch.