* Hyun Bin as Kim Joo Won
* Ha Ji Won as Gil Ra Im
* Yoon Sang Hyun as Choi Woo Young/Oska (Joo Won’s cousin)
* Kim Sa Rang as Yoon Seul
* Lee Philip as Im Jong Soo
* Lee Jong Suk as Han Tae Ssun
* Yoo In Na as Im Ah Young
* Kim Ji Sook as Moon Yeon Hong
* Park Joon Geum as Moon Boon Hong
* Kim Sung Oh (김성오) as Secretary Oh
* Choi Yoon So as Kim Hee Won (Joo Won’s sister)
* Kim Sung Kyum as Moon Chang Soo
* Lee Byung Joon as Park Bong Ho
* Sung Byung Sook as Park Bong Hee
* Yoon Gi Won as Choi Dong Kyu
* Yoo Seo Jin as Lee Ji Hyun
* Kim Gun as Yoo Jong Heon
* Baek Seung Hee as Park Chae Rin
* Kim Dong Gyoon as director
* Kim Mi Kyung as guest house ahjumma
* Song Yoon Ah as herself (cameo)
* Beige (베이지) (cameo)
* Kang Chan Yang (강찬양)
* Jang Seo Won (장서원)
* Kim Sung Hoon