Kim Hye Ji, known professionally as Kim Si Yun, is a South Korean singer, dancer, model, actress, and former member of GANGKIZ (갱키즈). She graduated from Sungkyunkwan University with a bachelor's degree in Acting.

Before debuting as a singer, she worked as a commercial model in 2010 and earned 2nd place in the 19th SBS Super Model Selection Contest.

She joined MBK Entertainment (MBK엔터테인먼트; formerly known as Core Contents Media) and was placed in the agency's new girl group. She made her debut in May 2012, using the stage name Kim Ga Hwa, as GANGKIZ's vocalist and lead rapper with their first mini-album, "We Became Gang".

However, the group became inactive after the promotional period of their debut album ended. Five out of the seven members (excluding her) presumably left the group around November 2013, but the agency did not announce it until April 2014. While there was never an official statement, it is assumedthat GANGKIZ quietly disbanded a few weeks later.

She changed her stage name to Kim Si Yun and now works as an actress.

(Source: MyDramaList) Edit Biography