Kim Myungsoo is a handsome and materialistic crown prince that doesn't care about politics , his father kim jaejoong "the king"  forces him to get married ,he must choose between 4 girls .

kim jongin , kim myungsoo little brother ,handsome cold prince , just care about his mother hate his father and his older brother .

Jung soojung , Jung Yunho little daughter , one of the king lawyers and the king bestfriend, cheerful girls who love party and have free minded different with other noble daughter . she live in london with her mother and move to seoul .

Son Naeun ( Son namgil daughter) her father is kingdom health minister . she's one of smartest girls , her love to art make her became one of favorite noble daughter.

Choi Jinri , (Choi Siwon daughter ) her father is cousin of the king , her personality is childish and little arrogant but everyone love her because her cute faced.

Baek Suzy ( Baek jinhoo) her father is royal secretary , her humble and bubble image make her became famous between her friends .

Prince Kim Junmyeon ,Prince Kim Minseok ( Kim heechul son , kim heechul , kim jaejoong brother)

Prince Sehun ,Princess hayoung

( her mother is kim ahyoung (kim ahyoung kim jaejoong ,kim heechul little sister)  married with prince oh jungsoo )

Wuyifan , Xi Luhan ,Lee howon , Choi Minhwan , Choi jonghun ( royal family )