Keira Knightley's three-year-old daughter cursed after their car was almost involved in a crash.
Keira Knightley
The 33-year-old actress has Edie with her husband James Righton, and has revealed that the tot let out the bad word in a very "polite" manner after her father was forced to slam the brakes on their car to avoid a collision with another vehicle.
Edie famously cursed for the first time on the night controversial candidate Donald Trump won the 2016 US presidential election, and Keira insists those two occasions are the only times her daughter has shown her bad side.
The 'Colette' actress said: "It was one of those country roads where it's a blind corner, and suddenly there's another car coming. The brakes got put on and there wasn't a crash, but there was a silence just afterwards and this little voice went, 'Daddy, is that when you say f**k?'
"It was very polite. Other than that, she has never said any - there's not been any swear words. So it's just twice, and both times perfectly."
Neither Keira or 35-year-old James - who wed in 2013 - have yet told their tot what the bad word means, as they don't know what to say.
She added: "What do you say? We've tried! We haven't laughed. We've just ignored the situation."
Aside from her occasional sailor's mouth, the 'Pirates of the Caribbean' actress says her daughter is "phenomenal".
She gushed: "She's great in every way. She's obviously a genius, and obviously the best child in the entire world. And very well made. But yeah, I'm very lucky. She's great. She's totally great."
And although she has a good grasp on bad language, she hasn't quite worked out how famous her A-List mother is.
Speaking to People magazine, Keira said: "I think she just thinks that everybody's mum is probably in pictures. It doesn't really strike her as anything weird."
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