Kate Hudson and Matt Bellamy may be relatively friendly exes, but the Muse rocker was nowhere in sight on Monday when we snapped the actress at Joel Silver's Malibu beach party. Instead, Kate's date was the former couple's adorable son Bing!

The two arrived early in the afternoon with a beach bag, and though Kate was wearing a baggy sweater and casual pants, once she went inside she stripped down to a racy white monokini. She's still a wild one!

Kate chatted with pals Tobey Maguire and his wife Jennifer Meyer at the bash, and in addition to Gwyneth Paltrow and Chris Martin, other stars in attendance included Courteney Cox, Diane Kruger, January Jones and a bikini-clad Bella Thorne.