One
One (정제원), real name Jung Jae-won, is a South Korean rapper and actor known as idol Cha Shi-an in Her Private Life. He runs his own label, Private Only.

Beyond the screen.
One is a South Korean rapper, singer and actor whose real name is Jung Jae-won. Born on 29 March 1994 in Seoul, he first became known through the duo 1PUNCH. He runs his own label, Private Only.
He is 176 cm tall, weighs 54 kg, and his blood type is A.
Early life
He grew up in Seoul with a love for hip-hop. In 2015 he debuted in the duo 1PUNCH with Samuel Kim.
Career and breakthrough
In 2017 he signed with YG Entertainment and made his solo debut with the album One Day.
Popular roles
His best-known role is Cha Shi-an in Her Private Life (2019), a famous idol singer. He also played the young Tagon in Arthdal Chronicles (2019).
Recent work
In 2019 he left YG and started his own label, Private Only. He released the album PRVT 01.
A career, chapter by chapter.
Selected drama roles
- Her Private Life — Cha Shi-an
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Selected credits in the Oxfea collection.
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