Ju Won Tak (주원탁) is a South Korean singer. He was a member of the boy group Underdog and project group RAINZ.
He made his solo debut on November 26, 2018 with the single "In The Light".
In 2016, Won Tak became a member of the boy group Underdog under the stage name Roel (로엘).
In 2017, he participated in Mnet's survival show Produce 101 Season 2, representing 2ABLE Company, but was eliminated in episode 5 and finished in 62nd place. Following the program's conclusion, he, along with other former contestants, debuted as a member of the project group RAINZ in October 2017 before disbanding a year later.
On November 26, 2018, he made his official solo debut with the digital single "In The Light".