Khloe Kardashian's fashion brand is launching in the UK. Prepare for the madness.

If you follow Khloe Kardashian on Instagram, you'll know all about her denim brand, Good American. It's got such a cult following, we're pretty sure she'll be joining sisters Kylie and Kim in the richest celebrities on Instagram club).

Now it's branching out into sportswear, and the good news is that it will be available in the UK too, exclusively at Selfridges. It's laucnhing at 2pm UK time today, so prepare for the madness.

As with the jeans, the activewear line, called Performance, will be available as always in an all-inclusive size range, ie from size XS to 4X. Developed by Emma Greed and Khloé as well as their team of female designers, it took a year to create, as they wanted to make sure the products fit every body shape.

Performance is priced from £48 - £157, and includes everything from sports bras to leggings and bomber jackets.

As with the rest of the collection, the campaign is modelled by members if the #GoodSuad, a group of confident and enspiring women such as body positivity activists and weightlifters.

Khloe revealed the launch on her Instagram last week, saying, 'Over a year in the making and as you all know fitness is my passion and I’m so proud of this line'.

Shop the collection below:

Shop now: GOOD AMERICAN sports bra for £75 from Selfridges

Shop now: GOOD AMERICAN Not-so-basic classic cami jersey body for £130 from Selfridges

Shop now: GOOD AMERICAN jacket for £130 from Selfridges

Emma added, 'When we workout, we work out hard, and we wanted to create a line that is super comfortable and looks good enough to be worn throughout the day, but also withstand a tough workout.'

Penny Goldstone

Penny Goldstone is the Digital Fashion Editor at Marie Claire, covering everything from catwalk trends to royal fashion and the latest high street and Instagram must-haves.

Penny grew up in France and studied languages and law at the Sorbonne Nouvelle University in Paris before moving to the UK for her MA in multimedia journalism at Bournemouth University. She moved to the UK permanently and has never looked back (though she does go back regularly to stock up on cheese and wine).

Although she's always loved fashion - she used to create scrapbooks of her favourite trends and looks, including Sienna Miller and Kate Moss' boho phase - her first job was at, sourcing the best deals for everything from restaurants to designer sales.

However she quit after two years to follow her true passion, fashion journalism, and after many years of internships and freelance stints at magazines including Red, Cosmopolitan, Stylist and Good Housekeeping, landed her dream job as the Digital Fashion Editor at Marie Claire UK.

Her favourite part of the job is discovering new brands and meeting designers, and travelling the world to attend events and fashion shows. Seeing her first Chanel runway IRL at Paris Fashion Week was a true pinch-me moment.