Yoon Si Yoon was born as Yoon Dong Goo, a name he used until his agency recommended an official change of name upon his entry into college.
Although High Kick Through The Roof is Si Yoon's acting debut, his first screen appearance was in a variety show, Introducing A Star's Friend, as the friend of actor and F.T Island member Lee Hong Ki.
2013 - Happy Noodle (ZJSTV)
2013 - Flower Boy Next Door (tvN)
2012 - High Kick 3: The Revenge of the Short Legged (MBC) cameo
2011 - Me Too, Flower! (MBC)
2010 - Once Upon a Time in Saengchori (tvN) cameo
2010 - King of Baking, Kim Tak Goo (KBS2)
2009 - High Kick Through the Roof (MBC)
2011 - One Hundred Percent
2010 - Gosa / Death Bell 2