Title : The King 2 Heart Romanisasi : Deokingtuheocheu Previously Known as : The King / 2 Hearts ( King 2 Hearts ) Genre : Romance , Black Comedy Episode : 20 Broadcast network : MBC Cast Main Cast Lee Seung Gi as Lee Jae Ha Kang Han Byul as Jae Ha ( young ) Ha Ji Won as Kim Hang Ah Jo Jung Suk as Eun Shi Kyung Lee Yoon Ji as Lee Jae Shin Yoon Je Moon as Kim Bong Gu / John Mayer The Royal Family Lee Sung Min as King Lee Jae Kang Park Gun Tae as Jae Kang ( young ) Yoon Yeo Jung as Bang Young Sun ( Ibu Suri ) Lee Soon Jae as Eun Gyu Tae WOC Members Jung Man Sik as Lee Kang Suk Kwon Hyun Sang as Yeom Dong Ha Choi Kwon as Kwon Young Bae Sinopsis Recaps : Lee Jae Ha adalah seorang Pangeran Korea Selatan yang tidak peduli dengan politik. Sepanjang hidupnya dia berusaha menjadi Pangeran yang tak akan mungkin dijadikan sebagai penerus tahta. Untuk memenuhi keinginan kakaknya yang seorang Sang Raja dia harus mengikuti WOC atau keluar dari kel