Catherine Zeta-Jones and Michael Douglas have built up quite a property portfolio during their 21-year marriage, with luxury homes in Bermuda, New York, Spain and Canada.

But there’s always room for more, and the couple now appear to be seeking a bolthole in London, just around the corner from Harrods.

These exclusive pictures, taken last week, show the Hollywood power couple leaving a Knightsbridge townhouse, which is listed on the market at £9.75 million.

Catherine Zeta-Jones, 52, (pictured) in London leaving a Knightsbridge townhouse

Michael Douglas, 77, (pictured) was dressed casually in dark trousers and a black zip-up Nike jumper in London

Catherine Zeta-Jones, 52, (pictured left) and Michael Douglas, 77, (right) have built up quite a property portfolio during their 21-year marriage

TUK residence has been a mansion overlooking the Lighthouse in Mumbles, Swansea

An aerial view of the house overlooking Mumbles Lighthouse, Swansea.

The property, a stone’s throw from Hyde Park, used to be two separate buildings before they were ‘seamlessly joined to create a superb and very special double house’, according to the estate agent’s blurb.

The current owners, believed to be a Russian family, bought it for £6.5 million in 2013.

Now at a cost of almost £3,000 per square foot, the mansion boasts five bathrooms, ‘semi-precious agate wall features’, a huge rooftop terrace and staff living quarters. 

The 52-year-old Ms Zeta Jones wore a navy jacket and beret, and was accompanied by her husband of 77 years, who was wearing dark pants and a Nike zip-up jumper.

The Oscar-winning couple's Villa S'Estaca in Mallorca was put on the market for £26 million (pictured)

The Oscar-winning couple’s Villa S’Estaca in Mallorca was put on the market for £26 million (pictured)

A witness said: ‘They spent around 45 minutes inside and looked pretty pleased with the viewing when chatting to the estate agent afterwards. 

It’s a gorgeous, quiet street and they had a good look around before getting into their chauffeur-driven Mercedes.’

They share a birthday and have purchased and sold many homes. In 2019 they had a major downsize, selling their upstate New York mansion for £12 million. 

They raised their children in Westchester’s eight-bedroom, 18-bathroom palatial heap.

At the same time they put their Bermuda villa on the market for £8.5 million and their Majorcan palace for £26 million. 

The 250-acre estate was home to friends like Jack Nicholson or Tom Cruise.

The couple are thought to own a 12,000sq ft manor house in Irvington, New York, bought for £3.6 million in 2019 - with an indoor pool and sprawling gardens (pictured)

The couple are thought to own a 12,000sq ft manor house in Irvington, New York, bought for £3.6 million in 2019 – with an indoor pool and sprawling gardens (pictured)

Ms Zeta-Jones's childhood home, in the Mayals suburb, went on the market for £475,000 in 2006 (pictured)

Ms Zeta-Jones’s childhood home, in the Mayals suburb, went on the market for £475,000 in 2006 (pictured)

Ms Zeta-Jones describes herself as an ‘interiors fanatic’ and posts images of luxury decor for her 3.9 million Instagram fans. 

They sold their Central Park apartment, with four bedrooms and six bathrooms, for £16 million this summer, but are thought to own a 12,000sq ft manor house in Irvington, New York, bought for £3.6 million in 2019, and a ski cabin in Mont Tremblant, Canada. 

Their UK residence has been a mansion overlooking the Lighthouse in Mumbles, Swansea – a far cry from the more modest family house nearby where Ms Zeta-Jones was brought up. Her childhood home, in the Mayals suburb, went on the market for £475,000 in 2006.