If You're Looking for the Actor Who Played the Teen Son Suk Ku in A Killer Paradox, You Will be Disappointed.

 Viewers were amazed at the uncanny resemblance of the actors who played the young version of Son Suk Ku in A Killer Paradox, praising the director for casting someone who looks just like him.

Here's the real story. That actor is NOT REAL.

The young actor who played the teen Jang Nam Gang is a virtual character. Yup, he's AI. According to WikiTree:

Instead, it was a virtual character created using deepfake technology, employing computer processing and AI. Deepfake involves using artificial intelligence-based human image synthesis technology.

Read on Son Sukku and Choi Wooshik's casting news on A Killer Paradox 

With the growing interest in the young actor, there's no information about him. Director Lee Chang Hee explained:

The acting was performed by a child actor, and we utilized CG (deepfake AI) technology utilizing Son Suk Koo's childhood photos.

In movies and dramas, it's common for other younger actors to portray the child role. However, in reality, they look nothing alike each other. Insisting otherwise would be dishonest. This (child actor not looking like the adult actor) is often accepted in cinema.

I'm not a fan of this cinematic acceptance. The deep fake technology seems to be an approach that hasn't been widely explored domestically. We invested significantly in this endeavor to enhance realism.

A Killer Paradox is currently streaming on Netflix.