Sienna Miller – who recently rekindled her romance with actor Jude Law – is unhappy about the way she is perceived, but is glad she never changed her ways to suit other people.

The 28-year-old star said: “I think if anyone documents their 20s, it’s not going to be ideal all the time. And I refused to conform. I wasn’t going to become agoraphobic. I was going to live my life.

“Of course I’ve made mistakes but I don’t really regret – I can’t really regret – anything, because that’s just part of growing up.”

While she has no regrets, Sienna admits she has become more guarded because speaking candidly about herself has caused her too many problems in the past.

She added to Britain’s Marie Claire magazine: “I’ve got an enormous mouth. No filter! I have to learn.

“Humour and sarcasm tend not to translate very well and I’d got to a point where I’d be completely joking and I caused quite a lot of drama for myself. So I’ve been trying to be a bit more guarded in what I give away because it wasn’t worth the headache it caused me at the end.”

Despite trying to be careful about how she is perceived, Sienna insists she doesn’t care what people think of her.

She said: “Ultimately you can’t obsess about what people make you out to be. I’ve made some mistakes in the past that have contributed to how I’m perceived but, to be honest, I don’t really buy into it. It doesn’t define me any more.”