Yuri as Czarina Zaffiro - Nerd, Masungit, Matalino
Jea-jin as Zac Fernandez - Captain Ball, Man of few words
Yoona as Sheila Krizel Lopez - Maypagka nerdy, kakambal ni Carl Kiel Lopez
JongHun as Zeth Smith - Matalino, Soccer Player
Jessica as Yassi Cruz - Matalino, Maganda
Seunghyun as Carl Kiel Lopez - Varsity Player, palabiro
Pimchanok as Princess Gaile Suarnaba - Maldita, Spoiled Brat , crush na crush ai Zac
Mario Maurer as Chad Zaffiro - Gwapo, Masungit, pilosopo, kapatid ni Czarina
Others:
Park Min-ji as Katherine - Friend ni Princess
Hongki as James - member sa FT Island
Kim Tae-hee as Ashley - Friend ni Princess
Minhwan as Drake- member sa FT Island
