Real name: Heo Young Saeng (허영생)
Birthday: November 3, 1986
Zodiac: Scorpio
Birthplace: Guangzhou City, Gyeonggi-do
Label: B2M entertainment
Group: SS501 (under DSP Media)
Position: Main Vocalist
Nickname : Otter, shy prince
Height: 178cm
Weight: 63kg
Blood Type: O
Family member: Parents
Hobbies: Online game, listening to music, selfie
Talents: Piano, singing, voice intimation
Idol : Song Hye Kyo
First Love: Middle school with a girl three years older than him
Ideal girl: cute, considerate, intelligence
Twitter: @mystyle1103

- He is shy and quiet in front of camera
- Heo Young Saeng was a trainee under SM Entertainment, making him close with members of TVXQ and Super Junior. He later joined DSP Entertainment and debuted as a member of SS501.
- He signed with B2M entertainment for his solo career
- Was given the nickname Otter because he looks like one
- Heo Young Saeng was the leader of the sub unit including him, Kim Kyu Jong and Kim Hyung Joon. This unit group was initially named “Triple S” but they changed it back to “SS501″. The unit group released a special project album "U R Man" and "Because I'm Stupid".