Lee Joon is the latest actor to announce a cameo appearance in the hit k-drama "Pinocchio," which stars Lee Jong Suk as Choi Dal Po and Park Shin Hye as Choi In Ha. So far, the drama has had some great guest appearances, including cameos by Jung Woong In and Yoon Sang Hyun, actors that worked with Lee Jong Suk in "I Hear Your Voice."

Jung Woong In, the nightmarish villain in "I Hear Your Voice," was featured in Choi In Ha's nightmare. Yoon Sang Hyun reprised his role as a public defender in Episode 12, working on behalf of Dal Po's brother.

Lee Bo Young supplied the voice for a car's navigation system. Miss A's Suzy Bae lent her image to a photo that was supposed to be a blind date candidate for Bum Jo, played by Kim Young Kwang.
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