Choi Seung Wook, previously known as ACE, is a South Korean singer and former member of PARAN (파란). He graduated from Kyunghee High School and later obtained a bachelor's degree in Musical Performance from Dankook University.

He made his debut in August 2005 as PARAN's vocalist (using the stage name ACE) with their first single, "Paran The First". The group was managed by Global H Media (글로벌에이치미디어, formerly known as NH Media) and was targeted for the international market as all members were fluent in English and Japanese and had experience in all areas of musical production from chorus, dubbing to sub-producing. However, they were never able to find success as some members enlisted in the military, and others decided to pursue individual activities. They never officially disbanded but have not released any material since 2008.

In 2019, he married a fellow singer and former member of CATS (캣츠), Kim Ji Hye (also known as Han Min Ah).

He is currently involved in musical theater and in a band called MY SUNSET with musicians of his age and is represented by TN Entertainment (티엔엔터테인먼트).

(Source: MyDramaList) Edit Biography