1. Yeo Chang-gu, better known by his stage name Yeo One, is a South Korean singer and actor.

1. Yeo Chang-gu, better known by his stage name Yeo One, is a South Korean singer and actor.
Yeo One debuted as a vocalist in a South Korean boy group Pentagon in October 2016.
Yeo One was born on March 27,1996, in Daejeon, South Korea.
Yeo One was a member of a school band and actively participated in band competitions.
In December 2013, Yeo One participated in a special dance performance alongside future bandmates Hui, E'Dawn, and Kino at the KBS Song Festival.
Yeo One took part on Mnet's reality survival program, Pentagon Maker, which aired online through Mnet's digital content brand M2.
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.
In 2019, Yeo One participated in reading the novel Youth, Beautiful Youth by Hermann Hesse through Naver Audio Clip Audiobook.
Yeo One was confirmed to be the lead role in web drama, Welcome to the Witch Shop.
In 2020, Yeo One returned to the small screen as a fictionalized version of himself on the TV Chosun entertainment drama Somehow Family.
In February 2021, Yeo One starred in the web drama Nickname Pine Leaf for the SBS YouTube channel yogurD, where he plays two different versions of himself: PD Yeo Chang-gu and Pentagon's Yeo One.
On October 9,2023, it was announced that Yeo One had left Cube Entertainment alongside fellow Pentagon members Yan An, Yuto, Kino, and Wooseok.
In January 2024, Yeo One joined the reality music competition show Build Up: Vocal Boy Group Survival.