Pre-debut In December 2013, Yeo One participated in a special dance performance alongside future bandmates
Hui,
E'Dawn, and
Kino at the KBS Song Festival. In 2014, Yeo One appeared in
G.NA's "Secret" music video and promotional activities. In July 2015, he acted in
Beast's
Son Dong-woon's "Kimishika" music video. In August 2015, he modeled alongside
Hyuna for the fashion brand Clride.n.
2016–present: Debut with Pentagon and solo activities He took part on
Mnet's reality survival program,
Pentagon Maker, which aired online through Mnet's digital content brand M2. On October 10, 2016, he made his debut as a member of
Pentagon on Mnet's
M Countdown with the track "Gorilla" from their debut extended play,
Pentagon. The song is described as a hip-hop song with magnificent, strong beats and masculine brass sound. During the show's filming, he made his acting debut with a lead role in web drama
Spark as the leader of an idol group, Dexter. The series was a commercial success and attracted global fans. In 2017, Yeo One was selected as the main character of
KBS1 musical drama
Joseon Beauty Pageant that set during the Joseon Dynasty's first beauty contest held. The drama also incorporates with traditional music with modern sensation and colorful images. In 2019, Yeo One participated in reading the novel
Youth, Beautiful Youth by
Hermann Hesse through
Naver Audio Clip Audiobook. He was confirmed to be the lead role in web drama,
Welcome to the Witch Shop. The drama deals with fantasy elements that is based on the theme of witch shops that can only be visible to people with eager wishes. In 2020, Yeo One returned to the small screen as a fictionalized version of himself on the
TV Chosun entertainment drama
Somehow Family. The show aired in March 2020, but was suspended after only two episodes due to the non-payment of staff. The show resumed filming in June but, due to scheduling conflicts, Yeo One was replaced by
Shin Won-ho of
Cross Gene. In August, Yeo One was cast as Nigel Bottom in the Korean adaptation of the comedy musical
Something Rotten!. The play ran from August 7 to October 18. Later that year, he was the cover model for the September 2020 issue of
Men's Health Korea. In February 2021, Yeo One starred in the web drama
Nickname Pine Leaf for the
SBS YouTube channel , where he plays two different versions of himself: PD Yeo Chang-gu and Pentagon's Yeo One. He appeared on the cover of Men's Health Korea for the second time in November. In August 2022, he appeared in the
KBS2 drama
If You Wish Upon Me. Later that year, he starred in the
King Sejong Institute Foundation web series
There is an Idol in my Living Room as a fictionalized version of himself.'' Later that month, he announced his first solo fan concert, to be held on November 25, which sold out within one minute. In January 2024, Yeo One joined the reality music competition show
Build Up: Vocal Boy Group Survival. In February, he held his first Japanese fan concert. After Yeo One's military discharge, he embarked on his first Asia tour in 2026. He released his first digital single "Run It Up" on February 11. == Personal life ==