At the event, Sulli talked about working on set with her fellow co-stars, and said, "It was a good atmosphere overall. Sung Dong Il sunbaenim was very kind to me and Soo Hyun oppa also played around a lot so there was no need for me to be anxious."

She added, "I think I became more comfortable towards the end of the shoot."

Sulli also admitted she had trouble getting into the scenario in the beginning. "I closed the script booklet as soon as I read over it. I didn't understand what was going on at first so I had to read it about three times," she said. 

The idol -turned-actress continued, "I think I finally got it after reading it the sixth time but I wanted to star in this film from the very beginning."

SEE ALSO: ILLIT praised for making a significant improvement in recent encore live performance

In 'Real', Sulli is taking on the role of a physical therapist named Song Yoo Hwa who treats Jang Tae Young (Kim Soo Hyun), a cold-blooded shooter.  'Real' is an action/noir film set in the world of crime and gambling. It is set to premiere at the end of June.