Kaley Cuoco was 22 years old when she famously began playing Penny in season one of The Big Bang Theory. Penny started out as Leonard and Sheldon's 21-year-old peppy blonde "girl next door" neighbor.
By season 12, Cuoco's Penny became more mature, more confident and organized, she valued herself more and viewers got to see that she was much more than the dumb blonde she was portrayed as early on in the series. The Big Bang Theory's Penny as a little girl would be just as easy-going and kind-hearted as she is as an adult.
Johnny Galecki started playing The Big Bang Theory's 27-year-old Leonard Hofstadter when he was 32 years old. Galecki's first acting role was when he was 12, so fans never got to see a baby Johnny Galecki or a baby Leonard.
The BBT's Leonard can be described as super intelligent, passionate and selfless. But as viewers of the show would know, Leonard is also arrogant and impatient. Over the seasons, Johnny Galecki's BBT character became more whiny and complacent. Baby Leonard Hofstadter, reimagined by AI, would obviously be a special baby and likely a baby genius already.
Raj Koothrappali as a little kid, reimagined using AI art, is one of the most adorable things. Raj was 25 during season one of The Big Bang Theory, and even then, he was level-headed and patient. And although the series ended with Raj still single, he was definitely one of the most lovable BBT characters. A little Raj would likely have most of the same traits and be just as sweet as Kunal Nayyar's BBT character.
Nayyar was 26 when he first started playing the iconic Raj in The Big Bang Theory, and he played the role until its final season when he was 38 years old. After 279 episodes of Big Bang Theory, Kunal Nayyar has gone on to play other roles, most notably as the voice of Guy Diamond in the Trolls movies.
Mayim Bialik's Amy Farrah Fowler didn't join The Big Bang Theory until season three, when the character was already 30 years old. She spends her time in the series as a well-respected and revered neuroscientist and has been described as the "female Sheldon." Her growth and relationship with Sheldon Cooper is a favorite for BBT fans.
Some details of Amy Farrah Fowler's childhood has been shared in the series. We know she was an only child and had a strained relationship with her mother. Before joining the Big Bang Theory group of friends, Amy was very lonely and is believed to have had no friends throughout school. In the AI-generated version of a Big Bang Theory's Amy Farrah Fowler, those big brown eyes and glasses are just about the most adorable thing.
With Young Sheldon, Big Bang Theory fans got to see what Sheldon Cooper would have been like was like as a kid. Jim Parsons' character is played by Iain Armitage in the coming-of-age sitcom and we must say, our AI art of Sheldon Cooper as a kid definitely resembles a younger version of Armitage.
We know from Young Sheldon that Sheldon Cooper has always been a "special boy" with quirks and brilliance. Sheldon was a child prodigy who showed interest in science at a very young age, maybe even by the time he was a toddler, as shown in our AI art. With his twin sister by his side, a very young Sheldon Cooper always had a companion.
Simon Helberg's Big Bang Theory character, Howard, was 25 years old when we first met him in season one. Howard's behavior during those early seasons could be described as "creepy" and "lecherous," but once he met Bernadette, things did start to change for the engineer.
We know from the series that, Howard Wolowitz's mom is completely over-bearing and often still treats him as a child. In our AI art of what Howard would look like as a kid, he does look well put together, but there is some mischief lurking behind those blue eyes. We can definitely see him as being a mama's boy even as a kid.
Like Amy Farrah Fowler, The Big Bang Theory first introduced Bernadette, played by Melissa Rauch, during season three, when the character was 23 years old. The character was the shy girl with the high-pitched voice who laughed at all of Howard's jokes. She earned her Ph.D and got a great job in microbiology. But as the seasons went on, fans started to dislike Bernadette and her snarky and judgmental personality.
During the BBT, we do learn that Bernadette never really wanted to have children, due to having to raise her siblings. But our little version of Bernadette, reimagined by AI art, is likely before all of that. She looks like she'd be the sweetest thing full of so many facts to share with anyone who would listen, and her voice would still be just as high-pitched as ever.
Comic book store owner, Stuart Bloom started off as a reoccurring character on Big Bang Theory, but joined the main cast about halfway through the series. Kevin Sussman was 37 when he started playing the 34-year-old, making him the oldest of the group.
Stuart's character did suffer a lot and wasn't always included in The Big Bang Theory's inner circle, but he did end up having a happy ending when the show came to its conclusion. In our AI-generaged version of what Stuart would look like as a little boy, he is super cute and still looks like he loves comic books.