Russell Brand and girlfriend Jemima Khan are claimed to have called time on their relationship.

The comic and movie star had been dating the well-connected journalist and campaigner since roughly this time last year, and rumours of engagement had been heard.

But now The Mail On Sunday claims that the couple have parted company, with a source saying: "The relationship has simply run its course."

The unlikely pair had been regularly sighted walking Khan's distinctive white German shepherd dog Brian and out on the town in London together.

And there's a hint that perhaps things didn't end well, because the pair have unfollowed one another on Twitter.