Actor Kim Soo Hyun's younger half-sister Kim Joo Na has made her debut as a singer by releasing her debut track, "How Do I Live Without You", one of the OST for SBS drama 'High Society'.

Despite being a famous actor, Kim Soo Hyun has never been too open about his sister's identity which remained mysterious until now. Kim Soo Hyun has been careful on mentioning his family on public.

On her instagram, Kim Juna wrote, "Finally releases my debut:)Please cheer for me !Thx♡" According to reports, Kim Juna has trained for 3-4 years as a singer. Are you excited for her singing career? Meanwhile, listen to her emotional singing voice below: