Ok Taec-yeon (; born December 27, 1988), known mononymously as Taecyeon, is a South Korean rapper, singer, songwriter, actor and entrepreneur.
 He is the main rapper of the South Korean boy group 2PM.
Kang Hee-gun (; born February 24, 1978), better known by his stage name Gary (Korean: 개리 , often spelled as Garie), is a South Korean rapper, songwriter, record producer, entrepreneur, and television personality.
 Besides a solo artist, he is also the rapper and lyricist of the former hip-hop duo Leessang.
 Since their formation in 2002, the group has produced a total of eight albums and had several hits under their belt.
 In 2014, Gary made his debut as a solo artist with the mini-album "Mr.Gae".
 Despite the album being banned by all major TV broadcast stations for its 19+ content, his songs still managed to top several charts.
 He and long time collaborator Jung In later went on to form the duo, Jung In & Gary.
 The two released the singles "Your Scent" and "Bicycle."
Park Jin-young (born September 22, 1994), referred to as Jinyoung (formerly as Jr.), is a South Korean singer, songwriter, actor, dancer, and choreographer.
 He is a member of the boy group Got7 and duo JJ Project.
 Park made his acting debut in the drama "Dream High 2" (2012) followed by supporting roles in "When a Man Falls in Love" (2013) and "Beloved Eun-dong" (2015).
 He made his film debut in the independent film "A Stray Goat" (2016).
Jung Il-hoon (; born October 4, 1994), simply known as Ilhoon, is a South Korean rapper, songwriter, record producer, and actor.
 He is the main rapper of the South Korean boy group BtoB.
 He is well known for his multiple song featurings with artists such as Hyuna and G.NA and as an assistant MC in the variety show "Weekly Idol".
 Ilhoon made his acting debut as he starred in the drama "Webtoon Hero: Tundra Show" in 2015.
 He was also known for inventing and popularizing the gestures for "Gwiyomi Player".
Lee Ye-ji (born August 26, 1994), better known by her stage name Yezi, is a South Korean rapper and singer.
 She debuted as a member of South Korean girl group Fiestar in 2012.
 Yezi was a semi-finalist on "Unpretty Rapstar 2" in 2015, during which she released several singles.
 Her debut solo maxi single, "Foresight Dream", was released on January 28, 2016.
Lim Sung-bin (Hangul: 임성빈; born September 12, 1987), better known by the stage name Beenzino (Hangul: 빈지노), is a South Korean rapper currently signed under Illionaire Records.
 His stage name is a play on that of Boston rapper Benzino, combined with "빈" (pronounced "been") from his birth name.
 Beenzino made his first official public appearance at Dok2's Hustle Real Hard Concert on June 5, 2011 and has since released three solo albums, as well as other works in collaboration with hip hop producers Primary and Shimmy Twice, and as the duo Hot Clip with South Korean rapper Beatbox DG.
 He is noted for his melodic style of rapping.
Jang Woo-young (Hangul: 장우영; Hanja: 張祐榮; born on April 30, 1989), generally known as Wooyoung, is a South Korean singer, songwriter and actor.
 He is currently based in South Korea as a member of 2PM, a six-member boy band managed by JYP Entertainment.
 He is mainly known for his work in 2PM and his role as Jason in the South Korean drama "Dream High".
 In 2009, he began to study broadcasting at Howon University.
Choi Seung-hyun (; born November 4, 1987), better known by his stage name T.O.P, is a South Korean rapper, singer, songwriter, record producer and actor.
 T.O.P rose to fame in the mid-2000s as one of two rappers in the South Korean boy band Big Bang.
 Released under YG Entertainment, the group became one of the best-selling groups of all-time in Asia and one of the best-selling boy bands in the world.
 In 2010, while the group was on hiatus, T.O.P and G-Dragon formed a duo to record and release the number-one collaboration album, "GD & TOP".
 As a solo rapper, he has released two digital singles, "Turn It Up" (2010) and "Doom Dada" (2013), which peaked at number two and four, respectively, on the Gaon Digital Chart.
Lim Jae-beom (Hangul: 임재범; born January 6, 1994) commonly known by his stage name JB (Hangul: 제이비), is a South Korean singer, songwriter and actor.
 He is a member of South Korean boyband Got7, and part of the duo JJ Project.
 JB made his small-screen debut through the drama series "Dream High 2" in 2012.
 He has also starred in MBC's "When a Man Falls in Love" as Seo-Min Joon.
Dream High (Korean: 드림하이 ) is a 2011 South Korean television series broadcast starring miss A's Bae Suzy, Kim Soo-hyun, T-ara's Ham Eun-jung, IU, and 2PM's Ok Taec-yeon and Jang Woo-young.

Question: Dream High starred which South Korean rapper, singer, songwriter, actor and entrepreneur?
Answer: Ok Taec-yeon