Expectant Kate Hudson has debuted her baby bump.

The actress, 31, and her boyfriend, British Muse rocker Matt Bellamy, were seen arriving at Heathrow airport on Monday – and Kate's burgeoning tummy was just visible beneath her winter clothes.

It's the first time that the star has been seen since it was revealed the happy couple are expecting a child together.

The Bride Wars beauty is already mum to seven-year-old Ryder with ex-husband Chris Robinson.

Recently Kate's famous mother Goldie Hawn shared her reaction to the pregnancy, saying: "You know, we're just all very happy. Happy for both of them. What's more to say?"

And speaking of musician Matt she added: "He is really fun.

"We all enjoy him and we understand why Katie really…what she sees in him. He is a great guy."

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Photo: � Rex