* [[Lee Bo-young]] sebagai Shin Young-joo<ref>{{Cite news|author=elliefilet |title=Actress Lee Bo Young to make her return to dramas in 'Whisper'!|url=http://www.allkpop.com/article/2016/12/actress-lee-bo-young-to-make-her-return-to-dramas-in-whisper|date=9 Desember 2016|accessdate=15 Maret 2017}}</ref>
* [[{{illm|Lee Sang-Yoon]]yoon|en|Lee Sang-yoon}} sebagai Lee Dong-joon<ref>{{Cite news|author=S.Ng |title=Lee Bo Young And Lee Sang Yoon Might Reunite For Upcoming Drama|url=https://www.soompi.com/2017/01/19/lee-bo-young-and-lee-sang-yoon-might-reunite-for-upcoming-drama/|date=19 Januari 2017|accessdate=15 Maret 2017}}</ref>
* [[{{illm|Kwon Yul (aktor)|en|Kwon Yul]] (actor)}} sebagai Kang Jung-il<ref name="allkpop">{{Cite news|author=beansss |title=Lee Sang Yoon, Park Se Young, and Kwon Yool join Lee Bo Young in new SBS romance drama|url=http://www.allkpop.com/article/2017/01/lee-sang-yoon-park-se-young-and-kwon-yool-join-lee-bo-young-in-new-sbs-romance-drama|date=25 Januari 2017|accessdate=15 Maret 2017}}</ref>
* [[{{illm|Park Se-young]]|en|Park Se-young}} sebagai Choi Soo-yeon<ref name="allkpop" />
=== Pendukung ===
* [[{{illm|Yoon Joo-hee]]|en|Yoon Joo-hee}} sebagai Hwang Bo-yeon
* [[{{illm|Kim Kap-soo]]|en|Kim Kap-soo}} sebagai Choi Il-hwan
