Jim Carrey is opening up on some unconventional tactics he used to endure playing the Grinch in his now-famous film.

Jim Carrey says a military torture expert was brought on to 'How the Grinch Saved Christmas' to teach him how to endure the makeup process.

Jim Carrey says the eight-hour Grinch prosthetics process triggered panic attacks and nearly made him quit How the Grinch Stole Christmas. A Vulture oral history says Ron Howard and Brian Grazer brought in SEAL Team Six founder Richard “Dick” Marcinko to coach Carrey through endurance tactics,

Jim Carrey revealed he almost quit the 2000 movie How the Grinch Stole Christmas due to the title character’s elaborate costume, even offering to return his multi-million dollar paycheck.

Actor Jim Carrey nearly quit "How The Grinch Stole Christmas" due to severe panic attacks from the makeup process and was given help from a SEAL Team Six officer.

Carrey described Marcinko as “a gentleman that trained CIA officers and special-ops people how to endure torture,” and recalled that his tips for the actor included punching himself in the leg, eating “everything in sight,” and chain-smoking.

Taylor Momsen, who played Cindy Lou Who in 2000’s ‘How the Grinch Stole Christmas’ when she was 5, revealed to PEOPLE in an exclusive interview at Jingle Ball 2025 how ‘insane’ it felt to reunite with Jim Carrey,

Although he hasn't spoken about it, many believe actor Jim Carrey has had plastic surgery or cosmetic procedures, due to the difference in his looks.