The group debuted the video for their Sport Relief single 'Proud' earlier today, which sees them performing the track at Wembley Stadium.
To mark the release of the promo, the four-piece uploaded a clip of themselves performing the song's chorus a cappella to their official Soundcloud account.
Talking about their new video, the band stated: "Filming at Wembley Stadium was absolutely incredible and we're the first artist to film a music video there.
"When I was younger I dreamed about playing in a World Cup final at Wembley but this was just as good!"
JLS will perform 'Proud' on the Sport Relief night of entertainment, which starts on Friday, March 23 at 7pm on BBC One.
They will also be performing a special one-off matinee concert for Sport Relief at The O2 on March 24 and will be joined by Olly Murs and Rizzle Kicks.
'Proud' will be available to download in the UK from March 19.
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Watch the music video for JLS's 'Proud' below: