We're so in love: Sienna Miller and married boyfriend share a laugh over lunch

The couple gazed longingly at each other as they ate with director Jerry Bruckheimer and his wife Linda.

Their public display of affection was a far cry from the last time the controversial twosome were pictured together when the 26-year-old actress walked as far apart from Getty as possible.

In love: Sienna and Balthazar gaze at each other during a lunch in Malibu

Sienna has faced a barrage of criticism over her relationship with the married father-of-four and is said to be upset at being labelled a ‘homewrecker’.

She has reportedly asked the 33-year-old oil heir to persuade estranged wife Rosetta to publicly admit that their marriage was over before they began dating.

‘Sienna is being portrayed as a femme fatale and fears for her career because Hollywood hates a home wrecker.

‘She hopes Balthazar can get Rosetta to put out a statement saying their marriage was already over,’ a source told the News of the World.

Friends close to the star have previously come to her defense, insisting that her relationship with the actor began several months after he had secretly split from 38-year-old Rosetta.

Tender touch: The couple have happily flaunted their relationship despite facing a barrage of criticism

An insider told the New York Post's gossip column Page Six: 'Sienna and he are in love. They are living together in LA. Everyone knows about her and accepts her.

'She and Balthazar met through friends and he was already separated from his wife.

'He should have announced his separation a lot earlier than he did - he'd been sleeping on friends' couches for six months.

'She was always told he was separated.'

Going strong: Friends say Sienna has moved in with Balthazar

Sienna relationship with the actor – who stars in Channel 4 show Brothers and Sisters - is also thought to be affecting her career .

Ex: Rosetta, without her wedding ring, and daughter June Catherine earlier this month

The release of her latest film, Hippie Hippie Shake has been pushed back until the storm around her private life blows over.  

The movie, also starring Derek Jacobi and Max Minghella, was due for release by Working Title and Universal this year.

But Universal is now insisting: ‘The film has always been slated for release in 2009.’

A Hollywood insider revealed: ‘Hippie Hippie Shake has been delayed until next spring at the earliest.

'The original plan was definitely to release it this year – the date was in all the trade magazines.

'One of the main reasons for the delay is Sienna’s love life.

'The studios hope the coverage will have died down by the spring.’