Kal So Won – Shim Cheong Kecil
Shin Eun Soo – Shim Cheong Remaja
Lee Min Ho – Kim Dam Ryeong / Heo Joon Jae
Jeon Jin Seo – Joon Jae Kecil
Park Jin Young – Dam Ryeong / Joon Jae Remaja
Lee Hee Joon – Jo Nam Doo / Park Moo
Shin Won Ho – Tae Oh
Shin Hye Sun – Cha Si Ah
Untuk melihat setiap keseruannya, jangan lupa saksikan sinopsis Legend of the Blue Sea!