has splashed out $5.3 million on the house next door to her California home.
The 'Something Borrowed' actress - who is currently expecting a baby with fiance Matt Bellamy - bought the luxurious English country style abode in Pacific Palisades after viewing several properties in the area.
The five-bedroom, six-bathroom home features a formal living room and two family rooms along with a wine cellar, gym, pool and library which should be more than enough room for Kate, Matt, the new baby and Kate's seven-year-old son Ryder with former husband Chris Robinson.
The purchase comes a few months after Kate and Matt reportedly bought a $6.4 million home in North London to use as their base when they are in the UK.
A source said: "Kate is ready to put down roots in the UK. She is in the process of filling out visa forms that will enable her to live in England with Matt for at least six months of the year.
"Kate looks at the UK as a great place to raise a family. She sees herself living and working from London for the long haul.
"Matt and Kate have shown Kate's parents Goldie Hawn and Kurt Russell around the area and Matt took them all to Devon to meet his parents. They also looked around Cornwall for a holiday home."