Although they did not achieve much commercial success; her duet titled "Jja La Ja JJa" with veteran singer Joo Hyun-mi earned a "Trot Music of the Year" nomination at the 2009 Mnet Asian Music Awards.
Apart from her group's activities, she has established herself as an actress, notably through her participation in the original and Korean versions of stage musicals including Moon Embracing the Sun, Gone with the Wind and Mamma Mia.
She also starred in the drama Moon Lovers: Scarlet Heart Ryeo.
A member of a top K-pop group, "Girl's Generation (aka SNSD)" and an actress, Seohyun made a huge image change with SNSD's new song, Holiday Night.
On the 31st, SNSD released a new teaser image and video clips for Holiday Night and Seohyun was the 6th member whose image was released.
She played a character named Sophie, a 20-year-old bride-to-be, who hopes to find out who her biological father is on her wedding day.