Brian Joo, better known as simply Brian, is a Korean-American singer where he is known as a member of R&B duo Fly to the Sky.
Joo was born in Los Angeles, California to Korean immigrants. The family later moved to Absecon, New Jersey. Joo was raised with a strict Korean upbringing, and learned to speak Korean and adhere to Korean customs. Brian's older brother, Jason, and their parents are employed at casinos in Atlantic City.
While attending Holy Spirit High School, a friend signed him up for an audition with Brothers Entertainment without Joo's acknowledgement. The company has discovered several Korean Americans who wish to pursue an entertainment career in South Korea. After several months of training, he was sent to SM Entertainment in Korea, and on December 9, 1999, made his debut as one of the two members of Fly to the Sky, along with Hwanhee, at the age of 17. Joo later went on to attend Rutgers University, but only completed a single year. Attending school in the States while simultaneously being a recording artist in Korea became too demanding, and Joo decided to cease his education in the States and return to Korea. While back in Seoul, Joo enrolled in Dongguk University, where he graduated from the Department of Theatre and Film.