- He really loves reading books, especially novels.
- His ideal type is chubby and petite girl with bright personalities over tall skinny girl.
- He initially declined the role in Princess Hours (2006) because he felt embarrassed.
- The actor has an associate degree in e-business and a theater degree.
- In the past, Ji Hoon had lived with Kim Jae-Wook for around 7 months.
- The model was invited to the Cannes Film Festival for his role in the movie The Spy Gone North (2018).
- He used the stage name Joo Ji Hoon because his real name Joo Young Hoon is the same as an actor.
- He debuted as a model after his mother's friends sent his portfolio to a magazine company.
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