Dream High 'Dramawiki' Players

Main Cast

• Suzy as Go Hye Mi
• Kim Soo Hyun as Song Sam Dong
• Taecyeon as Jin Gook / Hyun Shi Hyuk
• Ham Eun Jung as Yoon Baek Hee
• Wooyoung as Jason
• IU as Kim Pil Sook

Extended cast

• Ahn Kil Kang as Ma Doo Shik
• Ahn Sun Young as Kang Oh Sun (Oh Hyuk's older sister)
• Ahn Seo Hyun as Go Hye Sung (Hye Mi's little sister)
  • Park Eun Bin as 16 year old Hye Sung (ep 16)
• Lee Hye Sook as Song Nam Boon (Sam Dong's mother)
• Choi Il Hwa as Hyun Moo Jin (Jin Gook's father)
• Park Hyuk Kwon (박혁권) as Go Byung Jik (Hye Mi's father)
• Park Hwi Soon as Jin Gook's roommate (ep 1,2,5)

Cameos

• Jo Soo Mi (조수미) as herself (ep 1)
• Kim Hyun Joong as himself (ep 1)
• Nichkhun as Ri Ah's CF partner (ep 8)
• Hwang Chan Sung as Oh Sun's imaginary boy (ep 12)
• Lee Teuk as himself (ep 13)
• Eun Hyuk as himself (ep 13)
• Miss A as flash mob dancers (ep 16)
• 2AM as flash mob dancers (ep 16)
• Dal Shabet as Baek Hee's Kirin students (ep 16)
• Goo Joon Yup

Kirin's Teachers

• Uhm Ki Joon as Kang Oh Hyuk
• Lee Yoon Ji as Shi Kyung Jin
• Park Jin Young as Yang Jin Man (English teacher)
• Lee Byung Joon as Shi Bum Soo (Principal)
• Lee Yoon Mi as Maeng Seung Hee
• Baek Won Kil (백원길) as Gong Min Chul
• Bae Yong Joon as Jung Ha Myung (President) (ep 1-4)
• Joo Young Hoon (주영훈) as composing teacher (ep 11)

Kirin's Students

• Jun Ah Min as Jo In Sung (Jin Gook's friend)
• Jung Min Joo (정민주) as Jung Ah Jung
• Han Ji Hoo as Park Do Joon (sunbae)
• Yoon Young Ah as Lee Ri Ah
• Park Jin Sang (박진상) as Jun Tae San (sunbae)
• Kim Bo Reum as Ha So Hyun (sunbae)
• Bae Noo Ri (배누리)