Actors Kim Soo Ro, Lee Jong Suk, Kim Woo Bin, Min Hyo Rin and Lee Jong Hyun from idol band CNBLUE were spotted filming for the SBS show.

On March 18th, pictures of the actors were uploaded to several online blogs and SNS. As it is known, “Running Man” always films on Monday and/or Tuesday, so as expected, pictures of the guests for the next episodes are always a topic on Monday.

As per “Running Man” custom, their guest are always a secret for the cast, therefore their guests are always kept confidential until the day of the filming. Then fans and the show officially release pictures or statements regarding their guests.

On this day, the five actors were spotted filming in in Songdo, Incheon. Lee Jong Suk, Kim Woo Bin, and Lee Jong Hyun were spotted dressed in school uniforms. This is has to do with their recent roles in different dramas.

Lee Jong Suk and Kim Woo Bin acted as high school students, in the KBS drama "School 2013" which was hit with people. Kim Woo Bin also appeared alongside Lee Jong Hyun as students in the SBS drama “ A Gentleman's Dignity.” Kim Soo Ro was also part of the SBS drama.

People are excited, and want to know, what exactly is the theme, and the mission for this show. Kim Soo Ro even hinted on his Twitter that will appear in the show.

Viewers will have to wait till this episode of “Running Man” airs next Sunday, March 24th, on SBS at 5:10PM (KST).