Sienna Miller believes that her personal and professional life improved dramatically after giving birth to her and fiancé Tom Sturridge's first child together in May 2012. Before welcoming little Marlowe, the English actress had a reputation for what she calls a "quite chaotic" love life.

Sienna Miller
Miller thinks her career improved after giving birth

Miller was previously engaged to her 'Alfie' co-star Jude Law, and she was also involved in a highly publicized affair with married actor, and father, Balthazar Getty. However, the 33-year-old star recently told The Observer that motherhood "changed everything, if I'm honest. The stakes are higher. You have someone that you want to be proud of you eventually."

Miller further described how her mind-set changed when starting a family. "You're aware of your own mortality. For me, as soon as I had a baby I had a vision of my life - and what was left of it," she admitted.

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The 'Foxcatcher' actress also reveals that she thinks movie executives and casting agents look at her different now she is a mother. "I'm sure that factors. People who read the negative things [about me], the people who need persuading, are probably ignorant enough to assume, 'Well she's got a kid so she's serious now," Miller said.

"Which, of course, isn't the case," she added. "I'm still whoever I was. Maybe more mature, but the same. So amongst that ignorant, ridiculous area of my industry, I'm sure opinions of me have changed because I'm a mother now."

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Miller is currently starring alongside Bradley Cooper in the Clint Eastwood-directed biopic 'American Sniper,' for which she has already received rave reviews.