What do you get the girl who has everything? Margot Robbie takes a PINEAPPLE to Cara Delevingne's birthday bash

Celebrity friends must be difficult to buy for.

Especially if that person is one of the world's most famous models - as Suicide Squad actress Margot Robbie proved when she stepped out on Friday night.

The blonde beauty was seen carrying a pineapple to Cara Delevingne's birthday party, which took place in West London.   

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Fruity! Blonde beauty Margot Robbie was seen carrying a pineapple to Cara Delevingne's birthday party, which took place in West London on Friday

Fruity! Blonde beauty Margot Robbie was seen carrying a pineapple to Cara Delevingne's birthday party, which took place in West London on Friday

The blonde beauty caught the eye in a two piece blue tracksuit embroidered with her Christian name. 

Slightly cropped to show off her taut tummy, she also unzipped the jacket to flash even more flesh.

Capping the ensemble with a pair of high-top trainers, she was also casual in terms of hair and make-up. 

Sexy style: Margot caught the eye in a two piece tracksuit embroidered with her name

Sexy style: Margot caught the eye in a two piece tracksuit embroidered with her name

Ready to party! Slightly cropped to show off her taut tummy, she also unzipped the jacket to flash even more flesh

Ready to party! Slightly cropped to show off her taut tummy, she also unzipped the jacket to flash even more flesh

Sweeping her blonde locks into a casual side-parting, the fresh-faced beauty still managed to ooze glamour. 

Usually dressed-to-impress, the Suicide Squad star was meeting the anti-dress code for Cara's quirky bash. The British star insisted on a casual style rule - and lead the way with her own style. 

She kept her look casual on the night by opting for the same LL Cool J t-shirt and Puma tracksuit trousers she sported at Claridge's Hotel earlier that day.

She ditched the heels for a pair of pristine white Puma trainers and completed her low key look with a zip-up black jacket.

Adding an additional touch of vibrancy to her look Cara wore bold turquoise glitter eye-shadow that ensured she stood out ahead of her birthday celebration. 

Low key: Capping the ensemble with a pair of high-top trainers, she certainly worked the casual look

Low key: Capping the ensemble with a pair of high-top trainers, she certainly worked the casual look

Planning a late night? The actress also carried a take-away coffee with her into the party

Planning a late night? The actress also carried a take-away coffee with her into the party

As for Margot's gift of a pineapple - the fruit was a nod to Mayfair nightclub Mahiki, famed for their Hawaiian themed venue, who hosted the bash.

Cara's party had a nineties Hawaiian theme, hence the birthday girl's retro LL Cool J t-shirt. A source has told the MailOnline that all the guests bought along pineapples to make the club's famed cocktails.

Indeed, co-stars Joel Kinnaman and Jai Courtney - who was accompanied by girlfriend Mecki Dent - were also seen clutching the large tropical fruit upon their arrival. 

Meanwhile, Ed Sheeran sang happy birthday to his pal Cara and took over the DJ booth for awhile.   

Let's celebrate: Despite Cara Delevingne's birthday falling on August 12 – when she will turn 24 – the model and actress was nevertheless treated to a late night birthday bash on Friday evening 

Let's celebrate: Despite Cara Delevingne's birthday falling on August 12 – when she will turn 24 – the model and actress was nevertheless treated to a late night birthday bash on Friday evening 

Sister act: Cara was joined on the night by her older sibling, fellow model Poppy Delevingne
Sister act: Cara was joined on the night by her older sibling, fellow model Poppy Delevingne

Sister act: Cara was joined on the night by her older sibling, fellow model Poppy Delevingne 

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