Word around the street is that the cast of 'Book of the House of Gu', Lee Seung Gi, Yoo Yun Suk, Suzy, and more, are getting along well off-screen.

Recently released behind-the-scene photos show Lee Seung Gi and Suzy looking like the perfect couple in their matching costumes and ponytails. The two are glowing in happiness, while bystanders look on and smile too. Lee Seung Gi and Yoo Yun Suk were also spotted enjoying some small talk, as evidenced by their smiles, while warming up during a filming break. Both actors were still in their costumes with Yoo Yun Suk drenched in blood from a violent scene.

Park Tae Young PD commented, "Even during the tight filming schedule, Lee Seung Gi-Suzy-Yoo Yun Suk-Lee Yoo Bi-Sung Joon never lose their bright expressions. They're becoming a source of great energy on set. We are making a more high quality drama with the outstanding teamwork of the co-stars, who do their best."

'Book of the House of Gu' is proving to be the #1 Monday-Tuesday drama to tune in to as it kicks its way to the top of its time slot in viewer ratings.