Daily Mail journalists select and curate the products that feature on our site. If you make a purchase via links on this page we will earn commission - learn moreHappy birthday to the Duchess of Sussex, who celebrates her 45th birthday today!What better time to reflect on Meghan's effortlessly elegant style? While her fashion choices often spark debate (and perhaps she's occasionally lost a battle with the steamer), I've always admired her timeless California aesthetic.A lover of neutral tones, relaxed tailoring and understated silhouettes, Meghan consistently proves that simple pieces can make a lasting impression. Her looks are polished, sophisticated and effortlessly put together - a reminder that investing in key staples and thoughtful styling can elevate any wardrobe.Whether it's a classic striped shirt, a pair of jeans or an understated knit, these are pieces that can easily be adapted into your own closet and worn season after season. Below, I'm sharing some of my favourite recent outfits, complete with exact product matches and high street alternatives, so you can recreate Meghan's signature style at any budget.Crisp white tailoringMeghan was beaming in an all-white ensemble for her latest As Ever Instagram post - and it reminded me why head-to-toe white never goes out of style.She wore a tailored halterneck linen top by Reformation, teamed with a Posse midi skirt, tortoiseshell headband and sold-out Balenciaga sunglasses. The result was understated yet incredibly expensive-looking.Like Queen Camilla, Meghan appreciates the power of an all-white outfit. White brightens the complexion, always feels elegant and requires surprisingly little styling.Whether you're heading into the office, meeting friends for brunch or dressing for a summer garden party, an all-white outfit is one of the hardest-working combinations in any wardrobe. Better still, lighter shades naturally reflect the sun, helping you stay cooler in warm weather.Recreate the look for lessRetro beach chic Meghan's recent family holiday in Portugal offered a rare glimpse into her vacation wardrobe - and I immediately wanted to recreate it.The Duchess channelled Riviera style in a sleek low-back swimsuit that prompted comparisons with Princess Diana's iconic beachwear. Walking alongside Prince Harry and their children, Archie and Lilibet, she once again proved that simple silhouettes often make the biggest statement.She finished the look with her chunky Saucony trainers, adding a practical twist that still felt stylish.While the designer behind her swimsuit hasn't been confirmed, I'd happily bet on cult favourite Hunza G. Thankfully, similar low-back swimsuits are easy to find on the high street, making this one of Meghan's easiest outfits to copy.Recreate the look for lessThe striped shirt I'll wear forever If there's one item Meghan has convinced me every wardrobe needs, it's an oversized striped shirt.During her visit to Australia with Prince Harry, she wore Matteau's blue cotton-poplin shirt tied casually at the waist with relaxed Rolla's jeans and a P.Johnson jumper draped over her shoulders. She completed the look with Freda Salvador trainers and layered gold jewellery.It's the perfect example of her signature California-inspired style: relaxed, effortless and endlessly versatile.Throw this shirt over swimwear, pair it with tailored trousers, a midi skirt or your favourite jeans, and you'll have an outfit that works all year round.Recreate the look for lessDouble denim done right Double denim can be divisive, but Meghan has completely changed my mind.In a recent Instagram post, she wore a coordinating light blue denim shirt and jeans by Montecito label Tracy James, proving the so-called 'Canadian tuxedo' can look incredibly chic. Rather than feeling overly matchy, the look worked thanks to clever proportions. Her cropped chambray shirt paired flawlessly with high-waisted, wide-leg jeans, creating a silhouette that felt modern, flattering and relaxed.It's a reminder that double denim doesn't have to feel dated. Choose complementary washes, add simple accessories and let the tailoring do the talking.Recreate the look for less