Sadie Frost: The 41-year-old mother has lost her toyboy lover, 23 year-old Kristian Marr to 16-year-old Pixie Geldof The north London dating merry-go-round has stopped again - Sadie Frost's boyfriend Kristian Marr has ditched her for teenager Pixie Geldof. The 41-year-old ex-wife of Jude Law, who has a penchant for uber-toyboys, has been dumped by the musician, who is 23, for Sir Bob's 16-year-old daughter after her split with Mighty Boosh comic Noel Fielding. A source close to the group, who spend most of their lives flitting between the Hawley Arms pub in north London's Camden, said: "Kristian fancies Pixie a lot, it was coming towards the end for him and Sadie." Mum-of-four Sadie, who has also dated TV presenter Alex Zane and actor Andy Jones, was said to be besotted with the musician after they met through friends. However, the actress-turned-fashion designer seems to be finding it increasingly hard to hang onto her - often very young - men these days. Pixie had been going out with comedian Fielding for a couple of weeks until their romance fizzled out - because, we're told, she had to go back to school following her Easter break so wouldn't ever see Fielding, who is working on the next series of his BBC3 show. It is, however, Fielding and his close friend, Sadie's ex Zane, who are finding the latest collaboration hilarious - mostly because they joke about how Kristian only gets the women they have already pulled. A source said: "Noel and Alex are playing Kristian at the dating game, they think it's funny the girls swap their boyfriends so often." Sadie began seeing Kristian two months ago, and they were a part of the furniture in the trendy north London hangouts. No doubt it won't be long until yummy-mummy Sadie shows off her next toyboy conquest.