David Walliams says it's time for Simon Cowell to start practising changing nappies, not just for his new baby, but because Louis Walsh will be needing them soon.
We somehow can't imagine Simon changing nappies at all.
David thinks Simon should get some hands-on experience with the less glamorous side of parenting, ready as he becomes a dad for the first time.
Speaking on UK TV chat show 'Lorraine', David said: "It's one of those things, so many men say, 'I'm never going to change a nappy', it's actually not that bad. It's part of loving your child. And one day, he's going to have to change Louis Walsh's nappies - so he'd better get used to it now!"
The funnyman scoffed at Simon's statement he won't be in the delivery room with his girlfriend Lauren Silverman when the baby - who he hinted was going to be a boy - is born.
David - who has a four-month-old son Alfred with his model wife Lara Stone - exclaimed: "Of course you want to be there at the birth, it's a completely magical event. To hear your baby cry for the first time..."
The 42-year-old star also shed some light on Simon's diva-like behaviour on the 'BGT' set, claiming his entourage give everyone minute-by-minute accounts of his exact whereabouts.
He scoffed: "He has that kind of persona where he kind of likes to wind us all up. He likes the attention, as long as he's the centre of attention he's happy.
"He's always really late, he sometimes arrives at 4 o'clock in the afternoon. We get bulletins. Simon's five minutes away, Simon's one minute away. Simon's walking up the stairs. Simon's about to come in the door!"
Tagged in David Walliams Simon Cowell Lauren Silverman