South Korean girl group Red Velvet has already finished filming for the upcoming episode of variety show 'Running Man'.

According to a source from SBS, Irene, Wendy, Seulgi, and Yeri recently took part in filming for the show as surprise guests. Group member Joy was unable to attend because of filming for her upcoming new drama 'The Liar and His Lover'.

The episode with Red velvet is set to be aired on 12th of February.

Are you excited to see Red Velvet on Running Man? Let us know in the comments below.