We are always on the lookout for wardrobe heroes that we will be able to invest in, and then wear for years to come – and you can't get much more classic or versatile than the perfect blue jeans or a great black jacket. Just ask Amal Clooney and Meghan Markle, two of the most stylish women on the planet, both of whom have made a case for this uniform over the last month.

A few weeks ago, the Duchess of Sussex stepped back into the spotlight, attending the Invictus Games in The Hague alongside husband Harry, where she showed off a perfect, monochrome capsule wardrobe. One of our favourite looks of the weekend (bar perhaps the show-stopping Valentino trouser suit she wore) was also one of the most casual, and reminded us that investing in great basics and timeless classics is always the way to go.

Meghan wore a relaxed, loose-fitting pair of blue jeans, which were rolled up and then paired with a chic black boucle Celine jacket and Chanel ballet pumps, making an otherwise low-key outfit feel polished to perfection.

This exact fashion formula was also adopted by Amal Clooney this week, who was pictured heading out to dinner in New York City wearing baggy Re/Done blue jeans, which she teamed with a cropped black blazer. She finished the look off with a pair of silver Gianvito Rossi court shoes and a glossy black bag, making what could also be a great daytime outfit feel evening appropriate.

90s high-rise slim-leg jeans

Balmain Double-breasted wool blazer

Insert flare organic cotton-blend jeans

Prada Virgin wool blazer

Clooney is perhaps best known for her workwear wardrobe, which has also been on point this week – the human rights lawyer was seen wearing a chic polka-dot dress as well as a sophisticated head-to-toe cream ensemble. However, we also love to see her dressed in a more low-key way, and one which we can all easily emulate.

Creating a capsule wardrobe that works for you is all about investing in pieces that you know you will be able to team with anything, and wear for pretty much any occasion. Finding a comfortable, relaxed pair of blue denim jeans that fit you perfectly is a no-brainer when it comes to versatility, while snapping up a great black jacket to dress them up with (and which also pairs nicely over dresses or tailored trousers) is also a smart buy.

If you want something tailored inspired by Clooney, you will be spoilt for choice. We love The Frankie Shop and Jacquemus for oversized fits, while classic blazers from brands including The Row, Acne and Joseph are always great options.

If it is more of a Markle style you're after, look to Celine and Chanel for great boxy tweed or boucle jackets that you will have in your wardrobe forever – and don't forget to check designer resale sites for secondhand options of these too. And, for a complete guide to buying denim jeans, check out our guide here.