In 2010 he signed a contract with Soul Artist Management and in September of the same year debuted at a Tommy Hilfiger fashion show in New York City.
The same year he appeared in the Japanese edition of Vogue in a photograph by Mariano Vivanco.
From February to July 2011 he walked for various fashion houses in Milan and Paris including Calvin Klein, G-Star, Dolce & Gabbana, Bottega Veneta, Givenchy, and John Galliano.
[1] The same year he became a model for American Eagle and appeared in Vogue again this time in a photo taken by Steven Klein.
[2] Yoo was born in Busan, Korea, and lived there until he was ten or eleven, when his family moved to New Jersey.