Kim Rae-won is a South Korean actor. He first rose to fame with his appearances in the 2003 romantic comedy series Cats on the Roof, and movies such as My Little Bride (2004), Sunflower (2006), The Prison (2017), TV series Love Story in Harvard (2004), Gourmet (2008), A Thousand Days' Promise (2011), Punch (2014–2015), The Doctors (2016), and Black Knight: The Man Who Guards Me (2018).

Cats on the Roof is a 2003 South Korean television series starring Kim Rae-won, Jeong Da-bin, Choi Jung-yoon and Lee Hyun-woo. It aired on MBC from June 2 to July 22, 2003 on Mondays and Tuesdays at 21:55 for 16 episodes.