It started out as a light-hearted rivalry, but now things have turned nasty between chefs Gordon Ramsay and Jamie Oliver.
Gordon, whose wife Tana suffered a miscarriage last year, claims that Jamie boasted about having more kids than him.
"Jamie turned around and said, 'I've got five kids, he's got four kids," he told the Radio Times. "To judge someone else's family on the amount of kids they have, that's...
"Boys will always fight and butt heads but Tana was mortified. I mean really mortified."
This isn't the first time the pair have had a war of words. When Gordon hosted ITV's The Nightly Show for a week earlier this year, he made lots of digs at Jamie, calling him "fat" and criticising his cooking.
Jamie later told The Sun. "All my friends and people I work with in TV were very [bleep] off for me.
"But it's a bit like going to see someone you love who has dementia, who keeps forgetting and then doesn't remember what they said.
"It doesn't bother me anymore, but it was a lot. He hasn't texted to apologise."
He continued: "But he's got four kids and I've got five kids and I don't want to be slagging off some kids' dad on telly, it's not nice."
Jamie has daughters Poppy, 15, Daisy, 14, Petal, eight, Buddy, six and one-year-old River with his wife Jools.
Tana was mortified. I mean really mortified.
Gordon and his wife Tana are parents to Megan, 19, fraternal twins Jack and Holly, 17, and Matilda, 15.
Two years ago, Jamie said: "Gordon will do anything to try and take the [bleep] out of me because he is deeply jealous and can't quite work out why I do what I do and why he can't do that.
"He is just a ranter, he's paid to rant," he added, while speaking at the Sydney Royal Opera House.
"He's paid to shower negativity and his proteges don't talk to him because he's like that and it's a shame.
He later told Australian news organisation AAP that he regretted those comments. "I'm annoyed that I said anything," he said. "I don't want his kids to get upset because I'm slagging off their dad."