Sienna MillerSienna Miller has a reputation for dating her co-stars but now she’s reportedly keen to turn that on its head - by finding a film to star in with current boyfriend Balthazar Getty.

The actress, who was previously engaged to Alfie co-star Jude Law, dated Layer Cake co-star Daniel Craig and was linked to Camille lead James Franco, is said to be looking for the ideal script to star in opposite Brothers & Sisters star Balthazar - but her managers have advised her the public won’t get behind the project because many see Balthazar as dumping his wife and four children to be with Sienna.

A source told the Sun: “Her advisers are warning how unpopular that would be.

“People haven’t taken to them as a pair due to the way they got together. They fear people will find it a bit too sickly - and as though they are rubbing his wife’s face in it.

“But Sienna insists it could be movie gold and is looking for a script.”

The couple began dating in June but Balthazar only confirmed his separation from wife Rosetta the following month. Sienna and Balthazar split up after reported rows about Rosetta at the start last month but reconciled in London last week.