Sienna MillerSienna Miller has reportedly fled to New York to attempt to escape the backlash of her relationship with Balthazar Getty.

The actress is said to be staying with her father Ed Miller in the city until the storm blows and a source told the Daily Mail: “Sienna could not stay in London for fear of bumping into her ex, Rhys Ifans, whom she dumped in June, or worse, his friends who hate her.

“She also got the message that she wasn’t very welcome in LA. [Balthazar’s estranged wife] Rosetta is very powerful and well connected.

Patricia Arquette is a childhood friend and Demi Moore is one of her best friends. Naturally none of them will be inviting Sienna over for tea.”

The source added that the public reaction to the affair also may affect her career: “Her PR team in the UK had no idea about the affair because she kept it a secret from them.

“When they tried to do damage limitation, it was too late. They are very worried about the effect this will have on her career.

“Sienna is on an option to make two more GI Joe movies, which will make her a fortune, but there is genuine concern about how this negative publicity will affect the promotion around the first movie, which is due to come out next summer.”

Sienna and Balthazar are said to have started seeing each other in early June, with the relationship becoming public later in the month. Balthazar confirmed his separation from wife Rosetta last week.