Answer
Jang Keun-suk portrayed the character of Baek Dae-gil in the 2016 South Korean television series "The Royal Gambler". Baek Dae-gil is a street urchin who is skilled at gambling and is known as "The God of Gamblers". He is recruited by the king to become the king's personal gambler and help him to win back the throne from the usurper.