The year he turned 17, he passed an audition and returned to Korea alone from Canada. He trained at JYP Entertainment but did not debut as a singer. In 2015 he made his name known playing the violin on tvN’s Always Cantare season 2, and in December he debuted as an actor as Che A-jik in MBC’s Splash Splash Love.
In 2016 he played two roles in MBC’s Happy Home. In 2017 he played Park Se-gun in MBC’s Three Color Fantasy: Queen of the Ring and won the rookie award at the 2nd Asia Artist Awards.
In 2018 he played Yoo Chan in SBS’s Still 17 and won a New Star Award at the SBS Drama Awards. He says he fainted while filming in a heat wave and thought about quitting acting. In 2019 he acted with Park Bo-young in tvN’s Abyss.
The breakthrough yearThe year he turned 25, he played Seo Woo-jin in SBS’s Dr. Romantic 2, which reached a high of 27.1% in ratings. TV Report introduces him as an actor who made his name known through the series. That year he won Best New Actor in TV at the Baeksang Arts Awards and an Excellence Award at the SBS Drama Awards.
In 2021 he played Ha Ram in Lovers of the Red Sky, which ended at a series high of 10.4%, and won the Best Couple Award at the SBS Drama Awards with Kim You-jung. In 2022 he played Kang Tae-moo in SBS’s Business Proposal, which also made the Netflix global top 10. Herald Muse reported that the series took him to stardom. At the end of the year he also won a Top Excellence Award at the SBS Drama Awards.
In 2023 he played Seo Woo-jin again in Dr. Romantic 3, which reached a high of 16.8% in ratings, and played a dual role in Netflix’s A Time Called You. At the end of the year he won a Top Excellence Award and Team of the Year at the SBS Drama Awards.
In 2024 he was named in the male actor category at the Korea First Brand Awards. In 2025 he voiced Jinu in Netflix’s KPop Demon Hunters and made his screen debut in the film Omniscient Reader: The Prophecy. He was the first Korean actor to appear live on U.S. CBS News and won the New Artist Award at the Beautiful Artist Awards.
In March 2026 KPop Demon Hunters won the Academy Award for Best Animated Feature, and his casting in JTBC’s Final Table was confirmed. In April he began SBS’s Sold Out on You, and in May he attended the Met Gala and released a single with Khalid.
Ahn Hyo-seop (born Apr 17, 1995) debuted on Dec 13, 2015, the year he turned 20, in MBC’s Splash Splash Love, and became known on Jan 6, 2020, the year he turned 25, as Seo Woo-jin in SBS’s Dr. Romantic 2. In 2022, the year he turned 27, he played Kang Tae-moo in Business Proposal.
Ages are by calendar year (the year minus the birth year), birthdays aside.