Choi San (Korean: 최산; born July 10, 1999), known mononymously as San, is a South Korean singer and dancer. He is a member of the boy group Ateez, formed by KQ Entertainment.
San made his acting debut in the web series "Imitation" with bandmates Seonghwa, Yunho, and Jongho; this marked his first acting role. He contributed his vocals to the official soundtrack as a member of "Sparkling", a fictional 4-member group.
In addition to his work with Ateez, San serves as a global ambassador for Dolce & Gabbana.
Choi San was born on July 10, 1999, in Namhae, South Korea to mother Kim Nam Ji, and father Choi Jong Cheol. He attended Namhae Middle School and graduated from the Korean Arts High School.
San was introduced to KQ Entertainment by trot singer Na Sang Do, who is also his father's taekwondo student and the one who recommended him for an audition with the company.
San was introduced as a member of the pre-debut group KQ Fellaz alongside seven others, who now all are members of Ateez.
2018–present: Debut and activities with Ateez
While San debuted with Ateez on October 24, 2018 as the group's lead vocalist, he is now also known as and referred to as one of the main dancers of the group.
San has contributed to Ateez's discography and choreography. In 2023, he co-wrote the song "It's You" with bandmates Wooyoung and Yeosang which appeared on the album The World EP.Fin: Will. In July 2025, his first solo song, "Creep", which he co-wrote, was released as part of the album Golden Hour: Part.3 'In Your Fantasy Edition.
During promotions for "Bad", San's performances attracted widespread attention online. His ending choreography and stage presence went viral across multiple social media platforms, including Instagram Reels and YouTube Shorts, receiving coverage from Korean media.
2021–present: Actor debut and solo projects
In 2021, San made his acting debut in the web series "Imitation" with bandmates Seonghwa, Yunho, and Jongho; this marked his first acting role. In August 2021, San collaborated with Pentatonix on a remix of their song “A Little Space,” alongside fellow Ateez members Yunho and Jongho. The project combined elements of K-pop and Western a cappella music.
Between 2023 and 2024, San released song covers and a performance video. San's song "Snowflake" is an original track that highlights his vocal abilities. He has performed covers of "Breathe" originally by Lee Hi and "Dear Name" originally by IU, which he performed as a duet with bandmate Jongho. In November 2024, San appeared in the music talk show Lee Mujin Service where he delivered live vocal performances.
In June 2025, San made his first solo appearance on a talk-centered entertainment show on the show Naraesik, hosted by Park Na-Rae. Later in the month, San was invited to a Tag Heuer gala event in Seoul. In July 2025, San released his first ever official song "Creep" which featured in the album Golden Hour: Part.3 'In Your Fantasy Edition'. In October 2025, Dolce & Gabbana officially announced San as their Global Ambassador. In November 2025, San released an animated music video for his song "Creep", featuring a combination of live-action shots with digital painting. In December 2025, San appeared as a presenter for the 'Best Teamwork Award' along with Forestella's Go Woo-rim at the 2025 KBS Entertainment Awards.
In February 2026, San appeared on the South Korean variety show Boss in the Mirror as a Special MC.
In 2023, San's "Warriors" performance video, which he co-developed and co-choreographed, received praise from OSEN for its "diverse choreography composition" and from Single List for San's "detailed facial expressions that matched the mood of the song".
In 2024, San was credited with contributing to the choreography for the title track "Work" from the album Golden Hour: Part.1.
In 2026, it was announced that San participated in the choreography for the title track "Adrenaline" from the album Golden Hour: Part. 4. Hongjoong said, "San was involved throughout the choreography, which is how it came together". San explained, "To express 'Adrenaline' instinctively, I focused on movements that feel like blood rushing through your body, like tightening the neck or showing blood flowing".