Sienna Miller is "terrible" at being famous.

Sienna Miller

Sienna Miller

The 'Factory Girl' star found herself rocketed into the spotlight because of her high-profile relationship with Jude Law and party girl image and she's grateful that she's curbed her "hedonistic streak" and is focused on carving out a long-lasting film career.

She said: "You're photographed coming out of some pub, you've had too much to drink and you're in your twenties.

"It wasn't healthy behaviour, but it wasn't abnormal.

"I definitely have a hedonistic streak.

"Thank god I was never a heavy drug user.

"I was just frivolous in someways.

"I didn't have a business head.

"I wasn't being well managed.

"I have always been someone who is professional and on time and not an arsehole on set, but I suppose life in between was chaotic.

"I just don't think I was ready. I wanted to live. And I did.

"There are English movie stars who have normal lives and longevity. "There have been moments when I was incredibly famous and it doesn't suit me. I just can't. I'm terrible at it."

Sienna - who has seven-year-old daughter Marlowe with former partner Tom Sturridge - doesn't care about getting other people's approval and wants to further her career with interesting projects rather than "bigger and flashier" movies.

She added to ELLE magazine: "I could have taken routes that would have been bigger and flashier. I think I'm at a point where my life is so enriched by other things that a need for approval has completely dispersed. It doesn't matter to me anymore. I feel like the people who I would want respect from probably respect me."