Kate Hudson thinks she is expecting a baby girl.

The 'Bride Wars' actress - who is pregnant with her first child with British rocker Matt Bellamy - has done a "Pendulum test" which indicates the sex of a child, and the result has convinced her she is having a girl.

She said: "So here's the pendulum test. You take a piece of hair and you take a ring, and you string it through - this is very witchy of me!

"And then what you do is you hold it over your stomach. And then if it moves in a circle, it's a girl and a boy goes back and forth."

The 31-year-old beauty demonstrated the result on Entertainment Tonight, where the pendulum is seen swinging in a circle, and added she has had no dreams about the sex of the child, unlike with her seven-year-old son Ryder from ex-husband Chris Robinson.

She said: "How crazy is that? I've had no dreams I'm having a girl. And with Ryder it was back-and-forth."

However Kate - whose mother is Hollywood legend Goldie Hawn - claims she will not be disappointed if the baby is a boy because Ryder would be excited to have a brother.

She added: "If the baby comes out a boy - to see the look on Ryder's face to have a brother? I mean, forget it!"

It is not the first time Kate has revealed she thinks a girl is on the way because this pregnancy was the "opposite" to the first.

She said: "It's been seven years and I've totally forgot about what it's like to be - you know, your body changing and moving - and it's just, it couldn't be a more opposite pregnancy.

"So of course everybody says, 'Well, then that means you're having a girl', but I don't want to know."