Apart from his former band Take That, Robbie Williams reportedly also declined the invitation.

Source: https://stylecaster.com/charles-coronation-performers/

Gary Barlow from Take That has been a wonderful kindred spirit throughout my journey, and Olivia Newton-John was a guiding light for me.

Source: https://www.theguardian.com/lifeandstyle/2023/aug/19/delta-goodrem-looks-back

Other interviewees have not been confirmed, however it is possible that members of Take That could also feature.

Source: https://www.birminghammail.co.uk/news/showbiz-tv/netflix-release-documentary-robbie-williams-27960211

Perry, also a judge on, headlined the show alongside Richie and Take That.

Source: https://www.independent.co.uk/life-style/royal-family/lionel-richie-king-charles-comedian-b2339575.html

Since then, several big names have taken to the stage for one-off performances – including Victoria Wood, Shirley Bassey, Sir Cliff Richard and Take That.

Source: https://thenewdaily.com.au/entertainment/2023/08/30/kylie-minogue-tv-show/

Take That are suddenly engulfed by a flock of Katy Perry lookalikes, resplendent in their very own Quality Street wrappers.

Source: https://www.independent.co.uk/arts-entertainment/music/reviews/coronation-concert-review-photos-lineup-b2334703.html

Take That in concert at The Genting Arena at the Birmingham NEC.

Source: https://www.birminghammail.co.uk/whats-on/music-nightlife-news/gallery/elton-john-ozzy-osbourne-queen-19378485

Take That, Lionel Richie, Katy Perry and Andrea Bocelli will perform for the King and a crowd of 20,000 people including guests.

Source: https://www.theage.com.au/world/europe/celebrity-watchers-ask-why-has-meghan-disappeared-into-thin-air-20230415-p5d0oh.html?ref=rss&utm_medium=rss&utm_source=rss_world

The Princess of Wales greeted members of the public with her husband Prince William ahead of Sunday night’s coronation concert, where Lionel Richie, and Take That will be performing.

Source: https://wwd.com/fashion-news/fashion-scoops/king-charles-coronation-day-after-kate-middleton-reiss-1235644316/

Thousands of luncheons were organized as part of the celebrations Sunday, along with a nighttime concert at Windsor Castle featuring Katy Perry, Lionel Richie and ’90s boy band Take That.

Source: https://www.centralmaine.com/2023/05/07/big-lunch-follows-big-coronation-celebrating-king-charles/