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In the 2023 movie "The Marvels," Kelsey Grammer portrays the character of Dr. Hank McCoy, also known as Beast. Beast is a brilliant geneticist and a member of the X-Men, known for his ape-like appearance and superhuman strength, agility, and intellect. Grammer's portrayal adds to the rich cast of characters in the Marvel Cinematic Universe, bringing his unique charm and acting prowess to the role.