Netflix’s animated sensation KPop Demon Hunters has been a global hit since its release on June 20th, topping charts in over 22 countries.
The film tells the story of a K-Pop girl group who secretly battle demons while facing off against the rival boy group, the Saja Boys, who are demons in disguise.

Among fans, curiosity has been particularly high regarding the Saja Boys singing voices, which add an unexpected layer of talent and realism to the characters.

The leader of the Saja Boys, Jinu Saja, is voiced by actor Ahn Hyo-seop in his first voice acting role.

Interestingly, the singing voice of Jinu Saja is performed by Andrew Choi, a singer and composer under SM Entertainment. Andrew Choi, who gained fame by placing third on K-Pop Star Season Two, has composed for top K-Pop acts including Monsta X, NCT 127, and SHINee’s Taemin. His involvement demonstrates how much care was taken to ensure the Saja Boys singing voices sounded authentic and captivating.

Another member, Abby Saja, has his speaking voice provided by Sungwon Cho, while his singing parts are performed by NECKWAV, an R&B and Soul singer.

Romance Saja is voiced by Joel Kim Booster, with his singing done by SamUIL Lee, who previously went by the stage name Taebot.


Baby Saja, the youngest member, does not have a credited speaking voice, but his singing voice is provided by Danny Chung, a singer-songwriter under THE BLACK LABEL, who has written for K-Pop stars like BLACKPINK and Jeon Somi.

Finally, Mystery Saja is voiced by Alan Lee, with the singing voice performed by Kevin Woo of U-KISS, who has also enjoyed a solo career and even debuted on Broadway in 2022.
Fans have been amazed by the reveal of the Saja Boys singing voices, taking to social media to praise the high level of talent.
Comments include,
- No wonder the songs were insanely good—they gathered producer-level talent.
- Kevin from U-KISS? Everyone’s voices sound amazing.
- Andrew Choi—isn’t he the guy from K-Pop Star?
The combination of professional singers and skilled voice actors has made the Saja Boys singing voices a standout feature of the film, enhancing the overall experience for viewers.

For fans of K-Pop and animated storytelling alike, discovering the real Saja Boys singing voices adds another layer of enjoyment to KPop Demon Hunters. With such a talented roster behind the voices, it’s no surprise the film has been an international success.
Sources: Koreaboo

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