Kate Hudson With Baby Bing in London Pictures

Kate Hudson Carries Baby Bing Close During a Family Day Out

Kate Hudson and Matthew Bellamy out with Bingham in London.

Kate Hudson held baby Bingham on her chest during a walk around Notting Hill Saturday. The 4-month-old's dad, Matthew Bellamy, followed closely behind with Bing's stylish Missoni stroller. Kate and Bing are back in London with Matthew after a trip to NYC where she filmed The Reluctant Fundamentalist. Kate's oldest son, Ryder, visited her on set and checked out Kate's darker hairstyle for the role. She was back to blond just a few days later, and it looks like she's sticking with her lighter locks when she's not in front of the cameras.

The trio have been making the UK their home base since welcoming Bing back in July, and they've been busy during their stay. Kate and Matthew partied with pals like Stella McCartney and dined out with Kate Moss, but it hasn't been all about fun. Matthew's band Muse is recording their next album in London, marking the first time that all three members have been based in the same location.