Kim Yeon Jung was born in Shimane-ken, Japan in 1976. She is married to lyricist Kim Jung Bae whom she collaborates to create most of the songs released by S.M. Entertainment artists.
She was a '99 Alumna of the world famous Berklee College of Music, majoring in music production and engineering (MP&E). She moved to the USA to further her studies though her goal was still to be a music producer and composer in her native country, South Korea. Although she had been trained in classical music and knowing how to play piano and the trumpet, she had acquainted herself with the pop scene and through the knowledge of the success of S.M. Entertainment groups like S.E.S. and H.O.T., she set herself a goal to work with S.M., having that accomplished after graduating and meeting the CEO Lee Soo-man himself.
Her favorite songs of her own are the top selling number 1 hits, BoA's "My Name" and Girls' Generation's "Oh!", alongside f(x)'s debut song "La Cha Ta". For future goals, she wants to expand her horizons in the music field and work with U.S. and European artists to further explore and showcase the multi-cultural sound of her musical, which includes Western and Eastern influences.