Jim Carrey in the beloved film adaptation of The Grinch

In the last two decades, the 2000s big-screen adaptation of The Grinch has become an undeniable festive classic.

A surefire annual rewatch once cosy season rolls around, the live-action film depicts just how the frosty green heart of Jim Carrey’s character is thawed by the inhabitants of Whoville.

As familiar as you are with the tale, though, you might not know these behind the scenes facts about The Grinch, The Whos and even Mount Crumpit.

Here are 14 behind-the-scenes facts about The Grinch…

1. Jim Carrey underwent torture endurance training to help him tolerate the Grinch prosthetics

According to an interview on Graham Norton’s BBC talk show, the actor was trained by the actual CIA to help him endure the hefty costume required to transform him into the green meanie.

In 2022, the Canadian star said filming The Grinch was like “being buried alive every day” due to the heavy prostheses, and he could often be found smoking in full costume (complete with an oversized cigarette-holder to avoid anything going up in flames) to help him through the process.

2. Director Ron Howard became The Grinch on set for a day

Jim Carrey and Ron Howard on set

So intense was the costume, that director Ron Howard finally decided to give it a whirl to see what all the fuss was about – and he also directed the production decked out in it for a day.

“It must’ve been very confusing for everyone else,”

© HuffPost