The Oscar-winner was impressed by her daughter's acting ability at a recent school play.
At the Titanic 3D premiere at the Royal Albert Hall last night, Kate revealed that she found herself amazed by her 11-year-old daughter.
'We sat there going, "Oh no… she's actually a really good actress,"' explained the 36-year-old.
'She said: "Mummy, I've got this really excited, nervous feeling," and I thought, "Uh oh, that's the feeling."'
Imagine if her daughter starred in a Titanic remake!