In 2002, Yoona began her career through the SM Saturday Open Casting Audition. She passed the audition and spent the next five years undergoing training in singing, dancing, and also acting.
Is considered usually called the "Nation's Ideal Type" as she is often picked as the ideal girl by numerous Korean male and female celebrities.
Despite her sweet girlish image, Yoona is actually boyish.
Yoona is a fan of Japanese actor and heartthrob Takuya Kimura.