The star blames the snub on the dodgy haircut and beard he wore to play Aleksei Karenina – husband to Keira’s unhappy Anna in the 19th century high-society Russian drama.
“My kids banned me from collecting them from school unless I was wearing a hat and hid,” he laughs.
“My oldest, Rafferty, who’s almost 16, has been teaching me some London street slang because he wants me to be a bit cooler.
“At the moment he thinks I’m really uncool,” Jude admits.
“He says funny things like, ‘Bun those, they’re moist’ and ‘Allow it’.
“Apparently ‘bun those’ means it’s terrible and ‘allow it’ means can I have that. It’s utterly bizarre. It’s like a new language. I sound bloody ridiculous saying it so I’ve decided to stop.”
Jude, who had Rafferty, Iris, 11 and Rudy, nine, with ex Sadie Frost, 47, adds: “Rafferty is a good kid. He went through that teenage phase when he was about 13 and has slowly grown out of it.
“If I was lucky he’d give me a monosyllabic answer to things. If not, he’d just give me a grunt. Now he educates me in the music scene and he gives me advice on what I should be wearing.
“I just advise him on the sorts of films he should be watching and explain to him that it’s important to treat people the way you want to be treated.”
Jude became a father for the fourth time in 2009 after a brief fling with US undies model Samantha Burke, 27 produced Sophia, now three.
The Alfie star splits his time between his multi-million pound home in Highgate, North London and LA. His own parents were both teachers but now run their own drama school and theatre in Vaudelnay, western France.
And Jude, real name David, says he’s just a normal dad.
“Spending all day every day with beautiful women like Cameron Diaz and Keira isn’t hard but I don’t really see much difference between myself and any other working dad,” he said.
“Whether you’re a plumber, teacher or a nurse, we all get out of bed, go to work, do our job, and at the end of the day go home and look after the kids.
“That’s it. If you work and have a family you’re a busy dad.
“Simple as that. It doesn’t matter what you do.”