Sienna Miller was reportedly denied access to a Japanese restaurant in Malibu because of her relationship with married oil heir and actor, Balthazar Getty.

The 26-year-old star, who was photographed frolicking with the father-of-four on an Italian beach last month, has become increasingly unpopular stateside as her lover's estranged wife Rosetta's influence increases with the help of her Hollywood pals, including Demi Moore and Courtney Cox Arquette.

Miller felt the full wrath of Rosetta's rage recently, when the 38-year-old's group of girlfriends threatened to pull their support of the Japanese establishment if they allowed the 'Interview' actress access to the restaurant.

So, when she and Getty tried to secure a table at the eatery, they were promptly turned away and told that the restaurant was completely booked. Upon asking when a table might be available, Miller was informed that there would not be an opening for her.

A source told The Daily Star: "Rosetta is a key figure in what we call the 'Power Mom' group. She hangs out with Courtney and Demi and is well-loved.

"They're all livid that Balthy and Sienna are flaunting their relationship on Rosetta's doorstep. Malibu is a very, very small community. It really is indecent and it's not going to be accepted."

A sulky looking Miller eventually dined at Taverna Tony, where she and Getty met up with 'Brothers And Sisters' producer Jerry Bruckheimer, which seemed to cheer up the bad-tempered blonde, who was later seen smiling lovingly at her date.