นักแสดงซีรีย์ Radio Romance : Yoon Doo Joon as Ji Soo Ho Ahn Do Gyu as young Soo Ho Kim So Hyun as Song Geu Rim Lee Young Eun as young Geu Rim Yoon Park as Lee Kang Yoo Ra as Jin Tae Ri Supporting Cast Lee Eui Woong (이 의 웅 ) as Woo Ji Woo Kwak Dong Yun as Je Yi Seun Park Hyo Joo as Ra Ra Hee Ha Joon as Kim Joon Woo Oh Hyun Kyung as Nam Joo Ha Kim Ye Ryung as Jo Ae Ran Jung Hee Tae as Ahn Bong Sup Kim Hye Ji as Da Seul Yoon Joo Sang as Moon Sung Woo Lee Won Jong as Kang Hee Suk