Say goodbye to Lee Seung Gi's nice guy image, and say hello to him kicking some butt for the new drama 'Book of the House of Gu'!

Still cuts released show the singer-turned-actor filming his first action scene and surprising fans with his transformation into a fighter. It was also revealed that Lee Seung Gi went straight into filming his action scenes for eight hours straight and kept smiling throughout without any signs of exhaustion, showing his professionalism.

A representative revealed, "Lee Seung Gi filmed an exciting action scene that matches exactly with the martial arts action-packed drama."

PD Park Tae Young stated, "After a lot of practice, Lee Seung Gi was able to perfectly pull off the intense action scenes from the beginning. For his first historical drama and action role, please look forward to Lee Seung Gi the fighter."

The fantasy-historical drama, which takes place during the Joseon Dynasty, portrays the love and hate relationship of male 'Gumiho' or nine-tailed fox Choi Kang Chi (Lee Seung Gi) and martial arts instructor Dam Yuh Wool (miss A's Suzy).

The drama will premiere through MBC beginning on April 8 KST.