Sienna Miller ‘splits from fiance Lucas Zwirner’ nine months after he proposed

Sienna Miller has reportedly split from her fiance Lucas Zwirner just nine months after he’d believed to have proposed.

The actress, 38, was said to have become engaged to the literary editor, 29, back in January and she was subsequently seen sporting a diamond sparkler on her left hand.

However, New York Post gossip column PageSix now reports the relationship is over.

A source told the publication the actress was the one who broke off her engagement to Zwirner, who is almost a decade her junior.

They are believed to have dated for a year before Zwirner proposed, but they kept the relationship private.

Zwirner is the son of New York art dealer David Zwirner and he run’s the publishing house arm of his dad’s business.

During their relationship, they were seen out in public together as they attended Ellie Goulding’s lavish society wedding to Caspar Jopling last year.

They also attended the Writers Guild Awards together in February and were last pictured together last month.

It marks the third time Sienna has been engaged but failed to make it down the aisle.

She had previously planned to wed Jude Law and actor Tom Sturridge, the father of her daughter Marlowe who was born in 2012.

The Alfie star has also previously dated actors Balthazar Getty, Josh Hartnett and Rhys Ifans.

Mirror Online has contacted a representative for Sienna for comment.