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Korean actor Cha Eun-woo’s brother goes viral after giving AI lecture

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By Xportsnews
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Cha Eun-woo, left, and his younger brother / Xportsnews

Cha Eun-woo, left, and his younger brother / Xportsnews

The younger brother of Korean actor and singer Cha Eun-woo has become an online sensation after giving a public lecture on artificial intelligence — and for looking almost identical to his celebrity sibling.

On Monday, Lee Dong-hwi, who has been identified as Cha Eun-woo’s younger brother, appeared as an artificial intelligence (AI) researcher and speaker at the “AI Summit Seoul & Expo 2025” held at Coex in Seoul. His session, titled “AI recipe: The AI I built for my brother, now evolved into a brand-verification tool,” explored his work in developing AI data-crawling models designed for celebrity management.

According to the event’s description, Lee created an AI platform to assist entertainers like his brother Cha Eun-woo with brand credibility tracking — effectively blending entertainment and tech innovation. His face and professional profile were also featured on the official expo website, adding to the buzz.

Cha Eun-woo, second from right, talks about his younger brother during tvN’s “You Quiz on the Block.” Captured from tvN

Cha Eun-woo, second from right, talks about his younger brother during tvN’s “You Quiz on the Block.” Captured from tvN

Video footage from the conference showed a man with strikingly similar features to the ASTRO member — sharp eyebrows, sculpted jawline and composed demeanor — instantly setting social media alight. Comments flooded in, including “He looks identical even from the side,” “Out of everyone said to look like Cha Eun-woo, this one’s the real deal,” and “Perfect DNA — brains and visuals in one family.”

Cha Eun-woo's younger brother / Captured from tvN

Cha Eun-woo's younger brother / Captured from tvN

Lee had previously caught public attention when he briefly appeared on the tvN variety show “You Quiz on the Block.” During a segment featuring a semiconductor company executive-turned-intern, he was spotted walking with other employees — a mere four-second clip that nonetheless reignited curiosity about the so-called “genius-visual brothers.”

This article from Xportsnews is adapted by a generative AI system and edited by The Korea Times.