Gary Barlow has warned Robbie Williams he has some "hard work" ahead of him on 'The X Factor' judging panel.
The Take That star has told his former bandmate that being a panellist on the talent show - which Gary was for three series from 2011 to 2013 - is "tiring", but assured him he will have a top time on the programme.
He told The Sun newspaper: "It's going to be great, but I know what's to come with that show. I know what it does to you.
"He's got some hard work ahead, that's for sure. I've told him it's a lot of hours - more than people realise. It's tiring."
The 47-year-old star has also warned his 44-year-old pal about the editing that goes on, but believes fans will be in for a treat watching Robbie on the panel.
He said: "They film you for eight hours until you've had enough and then you say something bad - and that's what they use when it goes out.
"You're definitely going to see him turning the air blue, so tune in. He'll be disappointed if they don't let him."
Robbie is expected to be confirmed as a new 'X Factor' judge alongside his wife Ayda Field, singer Louis Tomlinson, and show boss Simon Cowell later today (17.07.18) - and Take That singer Howard Donald believes the 'Let Me Entertain You' hitmaker and his significant other will bicker on the show.
He said: "I think they'll be at each other's throats. That's why they've asked them to do it as a pair."
Ayda recently sparked further speculation she and Robbie are to join 'The X Factor' panel by refusing to deny the claims.
When asked if she is joining the show as a judge, she said: "It's very rare that I am speechless but I have no comment."
Robbie - who has five-year-old daughter Teddy and three-year-old son Charlton with actress Ayda - recently sparked speculation he could be joining the panel, but admitted "nothing has been signed" for 'X Factor', although he would "love to do it".
He said: "I've read these reports too and I would understand, because I've read the articles too, that people would think I'm doing 'The X Factor' and so is my wife. As it happens people say it every year and I always say 'no comment'.
"There's a lot of me that would love to do it, there's a lot of talking but nothing has been signed. Me and Simon and Lauren and my kids and little Eric hang out a lot and we talk about a lot of things. Nothing is signed, but watch this space."
Tagged in Robbie Williams Gary Barlow Ayda Field