Jim Parsons, famous for his role as Sheldon Cooper in "The Big Bang Theory," is known for his resemblance to his character. On Kaley Cuoco's birthday in 2018, he pulled a prank by posting pictures on Instagram. He shared a photo of her cake, tagging her, and another picture of Cuoco looking confused with his Instagram profile visible. Fans compared this behavior to Sheldon's arrogant nature. Cuoco found it funny and assured she wasn't offended. The pictures have been deleted, but the incident is remembered as a playful joke.