Real Name: Lee Hyukjae (이혁재/李 赫 宰)
Position: Lead Rapper, Lead Dancer, Vocalist
Nickname(s): Jewel Guy (보석미남), Monkey (from the Zodiac)
Date of Birth: April 4, 1986
Place of Birth: Goyangshi NeungGok
Height: 176 cm/5′ 9.3″ (mentioned on Yashimmanman that his real height was +/- 2 cm so 174 cm/5′ 8.5″ )
Weight: 58 kg/127.6 lb
Blood Type: O
Siblings: older sister Lee Sora (1984)
Pets: Choco (lives with his parents)
Specialty/Hobby: Dancing (all genres), Exercising, Listening to music
Education: Currently a student at Pai Chai University
Eunhyuk was born Lee Hyuk-jae in Neunggok, Goyang, Gyeonggi. In elementary school he was a member of a dance group, 'SRD', which stood for song, rap and dance, with childhood friend Kim Junsu. In 1999 when he turned thirteen, together with Junsu he auditioned for SM Entertainment through the company's Starlight Casting System.
Under SM Entertainment, Eunhyuk was trained in singing, dancing, acting, and had brief Mandarin Chinese language courses. In 2002 Eunhyuk, Kim Junsu, and another trainee Sungmin were placed in a project R&B group.
Eunhyuk officially debut as part of 12-member project group Super Junior 05 on 6 November 2005 on SBS's music programme Popular Songs, performing their first single, "Twins (Knock Out)". Their debut album SuperJunior05 (Twins) was released a month later on 5 December 2005 and debuted at #3 on the monthly MIAK K-pop album charts. In March 2006, SM Entertainment began to recruit new members for the next Super Junior generation. However, plans changed and the company declared a halt in forming future Super Junior generations.