Ever the chameleon, and star of Bridget Jones: the Edge of Reason, Renee Zellweger always manages to evolve her image with style. Rebecca Barnes checks out three of her award-winning looks

Streetwise and sassy at the Down With Love film premiere

General style: Renee's trip to London for the Down With Love premiere saw her looking streetwise and sassy with a retro edge. Her Sixties-inspired look, which was perfectly in keeping with her role in the film, featured a beautifully tailored double-breasted coat dress and black patent knee-high boots for a touch of sex-kitten glamour. Renee accessorised with a patent belt for a streamlined look and black fishnet tights - an outfit with attitude and a fitting choice for an autumn evening in the Big Smoke.

Make-up: The quintessential girl-next-door, Renee possesses an oval face shape, a flawlessly cool, dewy complexion and a smile which literally lights up her face. Opting for complementary make-up to match her sharp, tailored outfit and keeping it natural yet groomed and glamorous, smoky grey eyeshadow smudged into the upper and lower lash lines, softly defined eyebrows, black mascara, a hint of blusher and a matte berry lipstick that subtly intensified her natural lip tone, worked in perfect harmony with her outfit to give an up-to-date take on Sixties chic.

Hair: With her oval face shape, lucky Renee can carry off most styles, and this modern, layered blonde bob worn with a sweet, sideswept fringe, low side parting and softly flicking ends for movement has a much softer outline than other harder-edged versions, making it infinitely easier to wear and ultra chic to boot. Possessing naturally wavy locks, Renee's hair has been smoothed out with straightening irons for a sleeker, glossier look, and her colour is classic honey blonde and gorgeously shimmery.

How can you look streetwise and sassy?

Informal icon at the Shark Tale film premiere

General style: Unveiling a dramatic new hair colour at the recent film premiere, Renee's most recent look paid homage to the current 50s sweetheart fashion trend. To complement those new dark locks, the 35-year old actress chose a feminine grey and white print dress, minimal jewellery and metallic mocha strappy sandals and clutch bag that were an uncanny shade match with her new hair colour. These accessories really pulled the outfit together, ensuring that all eyes were on her.

Make-up: With such a strong hair colour, Renee's make-up needed to be noticed to avoid making her appear washed out. The actress worked her new look to perfection by opting for a monochrome colour palette, including natural toe and fingernails, defined eyebrows that framed her face, a touch of white-gold highligher worn on the brow bone to open up her deep-set eyes, rosy pink blusher applied to the apples of the cheeks for a healthy flush and baby pink lips that made the most of her full pout.

Hair: Having put Bridget Jones firmly behind her, Renee's sultry new look caused a sensation at the premiere, and her understated yet striking look succeeded in reinventing the actress's image once again. Her deep brown-black hair colour is for her next film, The Cinderella Man with Russell Crowe, and although the cool tone really works with Renee's alabaster complexion, it's early days as to whether or not she will continue to favour brunette over blonde. However, talking recently about her new look, she stated, 'I get more privacy because people don't recognise me. I didn't think it would make such a big difference.' To get the look, Renee's hair was simply flat-ironed, pulled back off her face for a clean silhouette, and gloss spray added for a mirror-like finish.

How can you look like an informal icon?

Red carpet classy at the Golden Globe Awards

General style: Hankering after a show-stopping outfit that would also flatter her figure for the Golden Globes, Renee asked top fashion designer Carolina Herrera to design an dress that would do justice to those pre-Bridget Jones curves, and the result was this uber-glamorous, midnight blue taffeta halterneck dress, a simple yet stylish choice for the ultimate A-list occasion. To add extra bling, Renee complemented the look with silver sandals, matching clutch bag and a stunning pair of sapphire and diamond brooches, which drew attention to her va-va-voom decolletage, and proved that the actress can work it Tinseltown-style with the best of them.

Make-up: In keeping with the overall feel of timeless glamour, Renee's award-winning make-up look majored on strongly defined eyebrows, midnight blue eyeshadow worn on the brow bone to flatter her eye colour and pick out the colour of the dress to perfection, lashings of mascara, a flawless matte base, tawny cheeks to warm up her porcelain skintone and soft berry lips for a perfect pout.

Hair: Renee has naturally fine, flyaway hair and the style needed to be soft and feminine to complement the dress. Her long, honey-blonde locks have been teased into undulating waves, with a sexy, side-swept fringe and extra height added at the crown area for a chic effect. This is the ultimate party style that's perfect for evenings out - to achieve a similar look, try back-combing the hair with a fine-toothed comb, an insider styling tip that really amps up the thickness and volume of fine, limp locks.

How can you look red carpet classy?