Dressed in chic, professional attire perfectly capturing the 'city vibes', Kim So Hyun commented, "Since I am mostly surrounded by adults all the time, I'm always careful about how I carry myself.  And that's a good thing."  She added, "In contrast, although it would be nice to say whatever I want like fellow friends, I don't have any past regrets."

Though that's not to say she turns into an energetic, youthful person on set, joking around with staff members.

SEE ALSO: Actress Kim So Hyun earns her driver's license

Most recently, Kim So Hyun made a special cameo appearance on drama 'While You Were Sleeping'.