Choi Si-won

Choi Si-won (Korean: 최시원; born April 7, 1986), known mononymously as Siwon, is a South Korean singer, songwriter, model, and actor, known for his work as a member of South Korean boy group Super Junior. Choi was a special representative for UNICEF Korea from 2015 to 2019, before being chosen as a UNICEF East Asia and Pacific Regional Office ambassador in November 2019. Aside from being a member of Super Junior, Choi has also ventured into solo activities, mainly acting. source: https://en.wikipedia.org/wiki/Choi_Si-won