Jang Hyeri (born Lee Ji-in on March 13, 1992, in Chuncheon, Gangwon-do, South Korea) is a versatile South Korean singer and actress currently under Big Daddy Entertainment. She initially gained recognition in 2010 as Ji In, a member of the girl group Girl's Day, debuting with their first mini album Girl's Day Party 1. However, she left the group after two months to pursue acting. In 2013, Hyeri joined the female band Bebop as their bassist and main vocalist, showcasing her musical talent. Bebop released their debut mini album, Between Calm and Passion, in 2014. Despite their promising start, Hyeri left the band in 2015 due to health issues. Hyeri embarked on her solo career with Chinese single "Really Like You" in 2018 and Korean single "난" in 2019. She also gained attention through her appearance on I Can See Your Voice 5. In 2020, she signed with Big Daddy Entertainment, adopting the stage name Jang Hyeri for her debut as a trot singer with the single "서방님". Known for her adaptability, Hyeri has released OSTs for popular dramas and participated in trot compilations. In 2024, she released "사랑이 원래 이런건가요" for the drama 우리집 고양이는 베지테리언.