Sienna can't stop smiling

Sienna Miller and Jude Law made sure they kept their distance from each other at the Hollywood premiere of her new film, Casanova.

The couple have been installed in a Los Angeles hotel all weekend - even turning down an invitation to the Bafta Britannia Awards ceremony honouring Tom Cruise and Dame Elizabeth Taylor to spend Friday evening in together.

At the closing night screening of Miller's new film at the American Film Institute Festival, Law arrived five minutes before she did.

Wearing a black suit, white shirt and white tie, the 32-year-old actor, who cheated on Miller with his children's nanny, smiled briefly for the cameras before disappearing into the Arclight Theatre on Sunset Boulevard.

His girlfriend, in contrast, spent more than 10 minutes posing. Miller, 23, wore a black corset and tight trousers with long, gold earrings to show off her new short hairstyle.

An onlooker said: "All the fans were hoping Jude and Sienna would arrive together. But it was very obvious they were making an effort to stop any photographer catching them standing next to each other.

Jude arrived first and made a low-profile walk down the red carpet. It seemed like he knew it was Sienna's night and let her take the limelight. She seemed in a very upbeat mood. She could not stop smiling."