Last October 11, Lee Jong Suk spent time with his fans during his autograph session for the men's clothing brand "Trugen" at the D-Cube Department Store in Sindorimdong, Seoul.

The actor charmed his fans with his adorable side through his endless smiles and cute gestures. Many were also touched at how approachable he was, which he showed by signing their posters, shaking their hands and even patting their heads.

According to a representative from the brand, "Lee Jong Suk and Kim Woo Bin brought in a lot of customers during their promotions for the product this season. The demand for catalogues and posters rose, evidently proving just how popular they are."

"As soon as the fans found out about the event, our office was flooded with messages and questions about Lee Jong Suk," he added.

Lee Jong Suk joins Seo In Guk and Girls' Generation member Kwon Yuri in the movie "No Breathing" as Woo Sang, an ambitious national swimming athlete who always aims for the top.

"No Breathing" will premiere on October 30.