Acting Martin Born March 20, 2008 · Songpa-gu, Seoul, South Korea (age 18) Martin is the leader of the South Korean boy group CORTIS. ↗ Share Known For‹NEW2026 CORTIS TOUR PUT YOUR PHONE DOWN IN LA: LIVE VIEWING · 20262026 CORTIS TOUR PUT YOUR PHONE DOWN IN LA: LIVE VIEWING★ 5.02026MovieMusic2026 CORTIS TOUR PUT YOUR PHONE DOWN IN LA: LIVE VIEWING▶+Lee Mujin Service · 2022Lee Mujin Service★ 8.52022SeriesTalk"Lee Mujin Service" is a high-quality live content in which MZ generation's representative singer-songwriter Lee Mu-jin, along with other artists, provides the best music service that catches the eyes and ears of music fans around the world.▶+CORTIS Documentary: What We Want · 2025CORTIS Documentary: What We Want★ 9.02025SeriesDocumentary‘What We Want’ is a close-quarters, four-episode documentary tracing CORTIS through the messy, electric work of making a debut. Cameras live where ideas become performances: late-night writing sessions, choreography workshops, visual development, MV production, and the final push onto the stage. Rather than tell you what to feel, the series lets the process speak—small breakthroughs, scrapped takes, honest feedback, and the stubborn will to try again.▶+› FilmographyAll (3)Movies (1)Series (2)SortPopularNewestTop ratedNEW2026 CORTIS TOUR PUT YOUR PHONE DOWN IN LA: LIVE VIEWING · 20262026 CORTIS TOUR PUT YOUR PHONE DOWN IN LA: LIVE VIEWING★ 5.02026MovieMusic2026 CORTIS TOUR PUT YOUR PHONE DOWN IN LA: LIVE VIEWING▶+Lee Mujin Service · 2022Lee Mujin Service★ 8.52022SeriesTalk"Lee Mujin Service" is a high-quality live content in which MZ generation's representative singer-songwriter Lee Mu-jin, along with other artists, provides the best music service that catches the eyes and ears of music fans around the world.▶+GuestCORTIS Documentary: What We Want · 2025CORTIS Documentary: What We Want★ 9.02025SeriesDocumentary‘What We Want’ is a close-quarters, four-episode documentary tracing CORTIS through the messy, electric work of making a debut. Cameras live where ideas become performances: late-night writing sessions, choreography workshops, visual development, MV production, and the final push onto the stage. Rather than tell you what to feel, the series lets the process speak—small breakthroughs, scrapped takes, honest feedback, and the stubborn will to try again.▶+Martin (self)