All of Red Velvet will be guesting on 'Knowing Brothers' ('A Hyung I Know') for the first time.

Seulgi, Wendy, Joy, and Yeri guested on the show a year ago, and this time leader Irene will be joining them. It'll be the first time the girls will be featured on the show as a full group.

The girls will be recording the show on July 6, and the episode will air on the 15th. Make sure to catch it on JTBC.

SEE ALSO: Seoul Philharmonic Orchestra reveals dramatic MV for Red Velvet's 'Psycho'

Tip: schoolrumble