Hollywood actress Sienna Miller poses as she arrives for a special screening of Bollywood actor Salman Khan's new film "Partner" for underprivileged children in Mumbai.[AP]

Actress Sienna Miller begged her parents to send her to boarding school when she was only eight years old.

The Factory Girl star attended a private school in Berkshire at the tender age of eight - but insists it was one of the best decisions she has ever made.

She says, "I was really young to make the decision, but my parents are amazing people and let me go there. Obviously, at eight, you can't really make a life decision, so as soon as I got there, I was terribly homesick, and it was tough.

"But I stuck it out, and after a month of being miserable, I started to love it. I had the best time there."