Real Name: Lee Sungmin (이성민/李 成 民)
Position: Lead Vocalist, Main Dancer
Nickname(s): Sweet Pumpkin (단호박 comes from his line in a one-episode drama called “Sea of sisters”), Minimi (미니미)
Date of Birth: January 1, 1986
Place of Birth: Ilsan in KyungGi Province
Height: 175 cm/5′ 8.9″
Weight: 57 kg/125.4 lb
Blood Type: A
Siblings: younger brother Lee Sungjin
Pets: Ari (Yorkshire Terrier dog, name means “Fighting” in Korean. This isn’t the same dog that he looked after for a month on “Animal Farm.” That Ari was adopted by another family.)
Specialty/Hobby: Chinese martial arts, Acting, Watching movies, Playing instruments
Education: Transferred from Seoul Arts University; currently a student at Myongji University
Sungmin was born in the Ilsan district of Goyang, Gyeonggi. He has a younger brother, Lee Sungjin. Sungmin's father Lee Chun-hwa, is the CEO of two companies: SendBill, which creates e-tax software, and Network Mania, an analytics company. In 2001, he entered the SM Youth Best Contest and jointly won first place for the Best Outward Appearance award with future band mate Donghae.
Together, they signed a contract with SM Entertainment and received training in singing, dancing, and acting. Sungmin was placed in a project R&B group with Junsu and future band mate Eunhyuk. In 2002, along with Typhoon, Rose and Attack, the six of them made their first television appearance in a show called Heejun vs. Kangta, Battle of the Century: Pop vs. Rock.
Sungmin officially debut as part of 12-member rotational group Super Junior 05 on 6 November 2005 on SBS's music programme Inkigayo, 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.