Actor Choi Woo Sik is gaining popularity among audiences for his adlibs.

Choi Woo Sik is currently playing Do Chi San in SBS's Wednesday-Thursday miniseries 'Rooftop Prince.'

Do Chi San is a unique character out of the three male characters. Although Woo Yong Sool (Jung Suk Won) and Song Man Bo (Lee Min Ho) were slow to adapting to the modern lifestyle, Do Chi San accustomed to modern life as soon as he arrived in Seoul.

Even when picking his clothes, he chose a shiny yellow outfit and dyed his hair to a bright brown color. He was also the first to call Park Ha (Han Ji Min) "Park Ha sister."

Ahn Gil Ho PD complimented Choi Woo Sik's preparedness, "Choi Woo Sik is the type to prepare adlibs after reading the script. He also discusses with the staff on site to perfect his comic scenes."