Ricki Lake and Ashley Roberts are set to join the ‘Let It Shine’ judging panel for the live shows.
The stars are set to do seperate shows but will both give their verdicts alongside Gary Barlow, Martin Kemp and Dannii Minogue during the live shows.
Ricki, who will join the show on February 11th, said in a statement: “I am super excited to be a guest judge on Let it Shine! I love musicals and this is a fantastic show.
“I was only 18 when I won the role of the original Tracy Turnblad in Hairspray so I can’t wait to share some of my own experiences with the boys. It is truly a pleasure and I’m excited to see the bands perform live for the first time! And not to mention, I am thrilled to be back in the UK!”
Meanwhile Ashley, who will join the following week, said: “I’m beyond excited to be joining Let It Shine and taking a judging seat beside the brilliant Gary, beautiful Dannii and handsome Martin.
“I’m looking forward to sharing my experiences of being in a band and I can’t wait to see what surprises the boys have in store for their live semi-final performances!”
Programme bosses have revealed the four bands will each perform a classic Take That hit before they are joined on stage by Gary and his bandmates Mark Owen and Howard Donald for a special performance of ‘Shine’.
The groups which make it through will then be disbanded and the contestants will be judged as individuals to get their places in the final.
Previous guest judges have included Amber Riley and Lulu.