5ive have reportedly failed to find a fifth member to join them for The Big Reunion concert, which takes place in London tonight.
Four of the boyband's original members reformed to take part in the ITV2 reality show, which follows a number of late-90s and early-00s pop acts as they take to the stage once more.
Jason 'J' Brown declined to rejoin the group, and the others begun searching for a replacement to make up the number they're named after.
However, according to The Sun journalist Colin Robertson, they have failed in their efforts and will now perform as a four-piece.
He tweeted: "#BigReunion news (you know you love it). 5IVE will still be 4OUR at tonight's "Big Gig". No takers."
This will no doubt please Ritchie Neville, who has been shown as saying that he was against the idea.
Ex-Eurovision entrants Blue have been added to the line-up for this evening's main gig at the Hammersmith Apollo, alongside 5ive, Liberty X, Atomic Kitten, Honeyz, 911 and B*Witched.
Tickets for the show sold out in minutes, leading bosses to announce a 12-date UK arena tour.
The Big Reunion continues on Thursday at 10pm on ITV2.