The electropop newcomers, who recently supported Girls Aloud on their UK tour, admitted that they were relieved when they finally saw the finished scenes.
"When we spent the day in Liverpool filming for Hollyoaks all those weeks back, we had no clue of what the finished product would look like," Jess Stickley wrote on the group's website.
"All we knew was that we had to film in silence and mime and dance to nothing because we were a part of a key scene in which the characters are talking by the side of the stage!
"When I finally did get a chance to watch it back it was really weird seeing it on TV now we all know what the set looks like in real life and how tiny the stage actually was! But it was so much fun to be part of a programme that I've always watched since I was small!"
Girls Can't Catch release their debut single 'Keep Your Head Up' on July 27.
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