The year he turned 17, he debuted as one of the 13 members of Seventeen.
In 2016, he appeared on MBC’s Duet Song Festival, and in December as a guest on KBS2’s Hello Counselor with Jeonghan. In July 2017, he set off for Samcheok with Lee Soo-geun, Jung Hyung-don and Park Sung-kwang on JTBC’s Night Goblin.
The breakthrough yearIn May 2018, he appeared on MBC’s Unexpected Q, and in July on KBS2’s Happy Together 3 with Mingyu. The year he turned 20, on Dec. 26, he impersonated Yoon Jong-shin’s “Wi-Fi” on MBC’s Radio Star and became a topic of conversation, and his name became known. Three days later he won best male newcomer at the MBC Entertainment Awards.
In January 2019, at the showcase for the 6th mini album, he spoke of rising quickly as a variety idol with his “Wi-Fi” impression, and in April he appeared on Running Man with Mingyu. In 2020, all 13 members of Seventeen appeared on MBC’s Oh! My Part, You, and in June the 7th mini album Heng:garæ passed 1.09 million copies in its first week. In October 2021, in the first episode of tvN’s Racket Boys, he received the top grade in all three level tests.
In May 2022, he attended the press conference for the 4th studio album Face the Sun. In February 2023, he released the BSS single SECOND WIND with Hoshi and DK, and in September he appeared on Netflix’s The Devil’s Plan. In November, Seventeen’s FML won Album of the Year at the MAMA Awards.
In May 2024, he appeared as a guest in the first episode of the YouTube show K Survival. The year he turned 27, in January he released the BSS single TELEPARTY, and in December he took his first solo MC role on the YouTube show Boo Seung-kwan’s Bibbidi Bobbidi Boo.
In January 2026, he released the mini album Serenade with DK, and in August it was announced that he would join the new season of TVING’s The Great Escape.
Seungkwan (born Jan 16, 1998) debuted as a member of Seventeen on May 26, 2015, the year he turned 17, and became known on Dec 26, 2018, the year he turned 20, when he impersonated Yoon Jong-shin’s “Wi-Fi” on MBC’s Radio Star. On Dec 11, 2025, the year he turned 27, he took his first solo MC role on the YouTube show Boo Seung-kwan’s Bibbidi Bobbidi Boo.
Ages are by calendar year (the year minus the birth year), birthdays aside.