Actress Sienna Miller was spotted alone at her sister's wedding, which took place Saturday night.

Sienna, 23, attended the hippy-themed wedding with her mother Jo and stepmother Kelly Hoppen, at Buckland House in Devon, England.

The actress, who broke the engagement with her fiancée, Jude Law, after he publicly admitted he had cheated on her with his children's nanny, explained that she came alone because her sister 'hates the whole celebrity thing and doesn't understand it."

Miller stated: "Jude is not coming. It's her big day and the focus should be on her. I've explained to Jude and he fully understands.

"This is my sister's special day. My sister is a real hippie. She hates the whole celebrity thing and doesn't understand it."

Just last week, the public booed Law, 33, who came to the London's Wyndham Theater to support Sienna, 23, in her final performance as Celia. He actually had to hide into Sienna's dressing room.

A source told Britain's Daily Star newspaper: "It was quite incredible. The crowd was clearly far from happy. At the end of the show one woman threw something at him, which looked somewhat like a pair of pants and then the audience slowly started to boo at him.

"It was rather embarrassing for all concerned."