Hye-ri of girl band Girls Day stars in the film "My Punch-Drunk Boxer" which goes on general release next month.
It is the story of a former professional boxer now reduced to menial chores in a gym after an unsuccessful career.
Hye-ri took lessons in janggu, the hourglass-shaped Korean drum, for two months to prepare for the film.
"When I first started, even hitting the higher-pitched side was hard," she recalls. "You will be able to see fun-filled scenes of rhythmic janggu-playing in the film."
"My Punch-Drunk Boxer" premiered at this year's Jeonju International Film Festival in May.