 In 2011 his character in the hit romantic comedy series "The Greatest Love", arrogant top star "Dokko Jin," became a mini pop culture phenomenon, giving rise to numerous commercial deals and parodies, as well as awards for Cha.Cha made his theater debut in 2012 in the stage play "Bring Me My Chariot Fire" alongside Japanese actors Tsuyoshi Kusanagi, Ryōko Hirosue, Teruyuki Kagawa, and Korean veteran actor Kim Eung-soo.Set in the historically turbulent early 1900s, the plot focuses on the friendship of artists from Korea and Japan who work together to preserve traditional Korean arts.