Oh Heejun 오희준 was born on Wednesday, May 8, 1996. His birthday falls in the Chinese Year of the Rat and the zodiac star sign Taurus. He’s the shortest in KNK at a height of 180 cm or 5'11", according to the official website, but other sources say 178 cm. He and Seungjun share the blood type B. Since Heejun is the maknae and he debuted at the age of twenty, the whole group was already well into adulthood when they first hit the stage as KNK.
Heejun has the cute habit of scratching between his eyebrows. He has a quick-witted personality and he likes playing guitar, soccer, bowling, and ping-pong. If you’re staying in, his favorite movies are Twilight and The Intern or any movie by his favorite celebrity, Amanda Seyfried. If you’re going out, he likes to go shopping.
If you’re having dinner, Heejun says his favorite food is braised or steamed chicken. He says that he doesn’t like ramen or Korean rice soup with oyster. As for beverages, he likes Coke or milk.
Heejun is the lead rapper for KNK so he loves listening to hip-hop, but he also likes rock and folk music. Two artists that he respects are Kim Kwangsuk and Dok2. His karaoke pick is "It’s Love" by Mose. Heejun wants KNK to be remembered as a group of real musicians and for people to think of them as artists.
Heejun wants to go bowling with fans to have fun with them. He also has a romantic side, saying he wants to travel around the world one day with his future wife.
He trained under FNC Entertainment before moving to YNB Entertainment.
He appeared with Inseong on the reality show "Cheongdam-dong 111" in 2013. He was in the show's Kokoma Band (꼬꼬마 밴드), which was established three months before filming. Heejun was the band’s vocalist and guitarist.
- The age gap between the oldest member, Youjin, and the maknae, Heejun, is 3 years, 2 months, and 28 days.
- The height difference between the tallest member, Seungjun (189 cm or 6'2½"), and the shortest member, Heejun (180 cm or 5'11"), is 9 cm.