Sleeper has just released Princess Diana-inspired loungewear

(Image credit: 1982 Anwar Hussein)

When you think of Princess Diana's iconic style, you probably don't immediately think of loungewear. However, Royals wearing casual clothes isn't as uncommon as you'd think.

The Duchess of Cambridge is a fan of jeans and Superga trainers for her less formal engagements, and Princess Diana also liked a casual ensemble, especially during her Sloane Ranger days, at the beginning of her relationship with Prince Charles.

Back then, she'd often be seen in jeans and boots, paired with an oversized blazer or knitwear layered over shirts with exaggerated collars.

It's this style decade of Diana's that inspired luxury pyjama brand Sleeper - the one behind the iconic feather PJs - to launch the Diana Athpleasure set.

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Diana Athpleasure Sweatsuit with Shorts in Grey, $220 at Sleeper

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SLEEPER Diana Athpleasure cotton-blend jersey sweatshirt and shorts set, £170 at Net-A-Porter

The set 'pays homage to Lady Diana’s iconic, off-duty style' and features cotton shorts, a slightly oversized sweatshirt and a white detachable collar for when you want to jazz things up a bit.

It's available in six different colours, ranging from butter yellow to pastel pink and more traditional black, though I'm in love with this sky blue version, which looks remarkably like the dress Princess Diana wore to the polo when she was pregnant with Prince William in 1982.

Sold.

Penny Goldstone

Penny Goldstone is the Contributing Fashion Editor at Marie Claire UK. She writes about catwalk trends and the latest high street and Instagram sartorial must-haves. She also helms the Women Who Win franchise.

She has worked in fashion for over 10 years, contributing to publications such as Cosmopolitan, Red, Good Housekeeping, and Stylist.