You Won't Believe How Cute The Big Bang Theory Cast Was As Kids

Born in Belgium, Johnny Galecki's father was stationed in the country at the time with the U.S. Air Force. However, it wasn't long before the family moved to the United States, which is why Galecki grew up in Oak Park, Ill. However, even then, he had dreams of Hollywood.

"I started talking about it when I was 3, and I have no idea how the word 'actor' was even in my vocabulary," Galecki told Variety in 2018. "No one in my immediate family was an actor, or even in theater or television or anything. We barely had money to go to the movies, let alone buy a theater seat, so it wasn't part of my family's lifestyle, and it was just my answer when people asked, 'What do you want to be when you grow up?' ... I feel incredibly blessed that that was the case because I see people, even in their 30s and 40s, struggling to learn what their calling is, and I think I just knew it as soon as I could speak."

Galecki followed his passion and started racking up credits in movies like 1989's National Lampoon's Christmas Vacation and on shows like Blossom in 1991. Of course, he also appeared on Roseanne, playing troubled teen David Healy, the boyfriend of Darlene, aka Sara Gilbert, another alum of TBBT and someone else who was an adorable kid. 

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