Lee Hyun-jae (Korean: 이현재 , born April 12, 1988) is a South Korean actor and drummer.
 He made his acting debut in South Korean television drama "High Kick Through the Roof" (2009).
 He featured in the commercially successful Chinese films, "Tiny Times 3" (2014) and "Tiny Times 4" (2015), and helped him achieved general recognition in China.
Namkoong Won (born August 1, 1934) is a South Korean actor.
 Namkoong was born Hong Gyeong-il in 1934.
 He was a popular actor of the 1960s along with Shin Seong-il, Shin Young-kyun and Choi Moo-ryong.
 Director Shin Sang-ok appraised his appearance that "The only Korean actor who has an international sense can compete Western actors."
 On the other hand, the flawless image limited his acting career.
Park Si-hoo (born Park Pyeong-ho on April 3, 1978) is a South Korean actor.
 He began his entertainment career as an underwear model and stage actor, then made his official television debut in 2005.
 After several years in supporting roles, Park rose to fame in 2010 with the popular romantic comedy series "Queen of Reversals" and "Prosecutor Princess".
 This was followed by leading roles in period drama "The Princess' Man" (2011) and thriller film "Confession of Murder" (2012).
Song Jong-ho (; born October 5, 1976) is a South Korean actor.
 Song debuted as a runway model in Park Byung-chul's fashion show in 1995.
 His print and runway modeling career lasted until 1999, when he turned to acting.
 He is best known for his roles in "Will It Snow for Christmas?
" (2009), "The Princess' Man" (2011), and "Reply 1997" (2012).
My Princess () is a 2011 South Korean romantic comedy television series, starring Song Seung-heon, Kim Tae-hee, Park Ye-jin, and Ryu Soo-young.
 It aired on MBC from January 5 to February 24, 2011 on Wednesdays and Thursdays at 21:55 for 16 episodes.
Park Ho-Jin (Hangul: 박호진; Hanja: 朴虎珍; born 22 October 1976) is a South Korean football player and football coach who plays for Gwangju FC.
Im Won-hee (born Seoul, October 11, 1970) is a South Korean actor.
 Im was an alumnus of the legendary Daehak-ro theater troupe "Mokhwa" (), starring in many of Jang Jin's stage plays.
 He made his film debut in Jang's black comedy "The Happenings" in 1998, and through the years has become one of the most versatile supporting actors in Korean cinema, with notable roles in "Three... Extremes" and "Le Grand Chef".
 But Im is best known for his iconic role Dachimawa Lee, which began in 2000 as the title character of a 35-minute short film that director Ryoo Seung-wan made as a parody/homage to '70s Korean genre action films.
 The internet short was enormously popular and received more than a million page views, and in 2008, Ryoo again cast Im in an action-comedy feature film based on the same character, "Dachimawa Lee".
Lee Min-woo (born Lee Dong-min on March 15, 1976) is a South Korean actor.
 He began his career as a child actor in 1981, then starred as the titular lead character in the 1997 teen movie "PpilKu".
 Lee has since appeared in numerous television series, notably the 2011 historical drama "The Princess' Man".
Song Seung-heon (; born October 5, 1976) is a South Korean actor.
Son Seung-Won (born June 29, 1990) is a South Korean actor.
 He is most active in musical theatre, and was the youngest Korean actor cast in the leading role in the Korean staging of "Hedwig and the Angry Inch" in 2013.

Question: What is the name of this South Korean actor, born in October 1976, and starring in My Princess?
Answer: Song Seung-heon