[9] In June 2008 Moon started appearing alongside Jang Keun-suk in profile pictures and movie previews of his first film Baby and I, leading up to the August 2008 release.

[11] In November 2012 Moon made a cameo appearance in his second movie called Love Clinique/Tone Deaf Clinic.

[15][16] From November 2008 until January 2009 Moon hosted a weekly South Korean TV program called Good Daddy.

In August and September 2010 Moon and his two younger brothers were in a South Korean TV program called 3 Suspicious Men.

[17][18] From November 2010 until February 2011 Moon and his two younger brothers were in a South Korean reality show called Hello Baby where celebrities experience parenthood by raising children ages 5 and under.