'I grew up in front of the world. My biggest achievement is staying sane': Inside the head of...Sienna Miller

The actress was an ‘eccentric’ child and is an ‘irritatingly’ optimistic adult. But when you’ve been in the spotlight as long as she has you’re bound to have a few little quirks – like tapping the plane three times before getting on…

'I'm often really happy, despite the exhaustion of having a young baby. I'm irritatingly optimistic regardless of what's going on in my life. I am resolutely a glass-half-full girl,' said Sienna Miller

What is your earliest memory?

It’s of my father’s shoe. It was a 1980s-style trainer with a big letter ‘N’ on the side and we were in the hallway of our house, I think. I distinctly remember the vantage point from which I was looking at it, which was obviously very low to the ground.