Super Junior's Sungmin, ZE:A's Hyungsik, F.T. Island's Seunghyun, 2PM's Jun.K, SHINee's Key, and musical actors Park Jin Woo and Um Ki Joon will take the lead as the handsome d'Artagnan. Athos will be played by Shin Sung Woo, Yoo Jun Sang, and Lee Kun Myung. Aramis will be played by Min Young Ki, Kim Min Jong, and Son Jun Ho, and Porthos will be played by Kim Bub Rae and Jo Sun Chang.
Seo Ji Young, Kim Ah Sun, and Sonya will take turns as Milady de Winter. Kim Yeo Jin, Kim Sa Eun, Dana, and Wonder Girls' Yenny will also capture the heart of D'Artagnan as Constance.