The killer twins, Jeong Pil Jae and Jeong Pil Seung from I Hear Your Voiceare identical twins in real life! In the drama, the twins make contradicting confessions after stabbing a supermarket owner to death. These brother actors surprised many, because the audience thought it was actually two roles played by a single actor.

The older twin (Han Ki Won) studied film at Sejong University and has appeared in a few movies and plays, including Hamlet and Seagull. The younger brother (Han Ki Woong) graduated from Seoul Institute of the Arts and also studied theater and film.

It seems that the twins are getting more spotlight than the main actors Lee Jong Suk and Lee Bo Young -- for the moment, at least.