Former Pop Idol winner Will quit Strictly Come Dancing at the beginning of the week and cited "personal reasons" for his sudden exit.
Darcey has now spoken out about his decision to leave, adding that she believes he could have made it to the final of the BBC One show.
Speaking to Mail Online, Darcey said: "It's sad. Unfortunately, being a judge, we are not allowed to see the rehearsals or what happened during the week so you don't know the ins and outs and you only arrive on the day of the live show.
"it's horrifying to think that somebody who could have easily got to the final [has left]."
Although Darcey didn't explain Will's reason for leaving, she did confirm that it was NOT to do with his on-screen spat with head judge Len Goodman.
Following what turned out to be his final performance, Will had an awkward exchange with Len about how much Salsa had been in his routine. Len had told the singer he would've liked to have seen more traditional moves, and Will replied: "There are 24 counts of Salsa in the routine." But Len told him: "Well I must say, most of them I didn't recognise."
Will and partner Karen Clifton were ranked fourth on the leaderboard, making them one of the stronger pairings in the competition.
However, on Monday night, Will released a statement saying: "Unfortunately, I am leaving the show for personal reasons. I leave with joy in my heart that I have been able to take part in one of the most loved shows on British television."
He added: "To be a part of Strictly has been a long time ambition of mine. As a performer, a viewer, and a fan of the show, to dance as a contestant was an experience I always hoped for. I have made some great friends, and am in awe of their performances week in, week out. I have found a creative partnership with Karen that has been the most wonderful thing to experience. I will be eternally grateful to her for her direction, talent and guiding me through three wonderful dances that I will be able to show my grandkids in years to come."
Following his exit, Will sent a text to Radio 2 saying he was feeling "dandy", adding that his exit was "very undramatic".
Strictly bosses have since confirmed they will not be bringing in a replacement for Will.
Strictly Come Dancing continues on BBC One this Saturday.
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