Russell Brand has allegedly split from Jemima Khan.
The 40-year-old heiress reportedly dumped the 39-year-old comedian, who is known as a notorious lothario, last month following just a year of dating.
A source told the Mail on Sunday newspaper: "The relationship has simply run its course."
The pair also added fuel to the fire after it became apparent that they'd 'unfollowed' each other on Twitter, which is unusual for the brunette beauty as she usually remains close friends with her former
Earlier this year, Russell - who split from Katy Perry in 2011 after 14 months of marriage - bragged about his "very different" relationship with Jemima and said he couldn't be happier with their fast-moving romance.
He said at the time: "'I'm going to be really kind in this relationship.
"I haven't been out there trying to nail everyone. 'I'm very, very happy in a relationship that feels very different from anything I've experience before.
"I feel like its grounded in friendship and a sort of love and it's all well cool and exciting and stuff, but it feels different for me."
Meanwhile, Jemima has two teenage sons Sulaiman and Kasim with her ex-husband Imran Khan and has previously dated hunky actor Hugh Grant.