Kate Hudson and Matt Bellamy engaged

Kate Hudson and Matt Bellamy have got engaged.

The couple are currently expecting their first child together and the 32-year-old actress - who has a seven-year-old son Ryder with ex-husband Chris Robinson - has now revealed they plan to marry after showing off a huge square-cut diamond ring during an appearance on the 'Today Show'.

After host Matt Lauer pointed out her ring, Kate laughed and said: "It just happened a week ago, I'm so glad you noticed. I haven't really announced it and I felt like the announcing thing feels so silly, and I was just waiting for someone to notice.

"He's a beautiful man, and I'm excited."

Kate refused to give details on the proposal, which took place in New York last week, but admitted it was "very sweet, very romantic", and said they have not yet set a wedding date.

The 'Fool's Gold' star - who has been dating the Muse rocker for a year - recently insisted she has no plans to marry again.

She said: "I don't like putting that sort of pressure on it and I don't feel it necessary to get married.

"I already have one child and have had one divorce so it is not necessarily the golden ticket. I just want to be happy."

Paul Watson, astrologer and founder of SomebodytoLove.com, does not predict the relationship will last long and said: "Kate and Matt's engagement is no surprise. Kate is an Aries and Matt a Gemini which matches 100% and their initial attraction to each other is immense but it's never going to last.

"Kate wants nothing but domesticity- to settle down and have kids - and Matt is a free spirit that will hate being tied down. He's also not swayed by the bright lights of Hollywood, so they'll have a battle on their hands when Kate tries to pin him down there.

"The initial attraction should see them through the first year of marriage but it doesn't have any longevity."