Are Cara Delevingne and girlfriend St. Vincent the latest members of the Mile High Club? Star couple 'raised eyebrows after returning from cubicles looking dishevelled'

They packed on quite the PDA during Burberry’s London Fashion Week show on Monday.

And it appears as if Cara Delevingne and girlfriend St. Vincent are reportedly the latest members to join the notorious Mile High Club.

Ahead of their amorous display, the smitten couple were travelling from LAX to London’s Heathrow airport for the British model’s appearance at the UK premiere of Pan on Sunday afternoon.

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Cara Delevingne and girlfriend St. Vincent are reportedly the latest members to join the notorious Mile High Club - pictured here after their flight from LAX to Heathrow on Sunday

Cara Delevingne and girlfriend St. Vincent are reportedly the latest members to join the notorious Mile High Club - pictured here after their flight from LAX to Heathrow on Sunday

During their transatlantic Virgin flight, passengers on their plane claimed the pair were passionately kissing in their seats before sneaking off into the cubicles for 15 minutes, reports The Mirror newspaper.

An eyewitness claimed: ‘The girls were really PDA-ing. They couldn’t keep their hands off each other while they were kissing, and it set the other passengers’ tongues wagging.

After reportedly heading to one of the cubicles together, both Cara, 23, and St. Vincent, 32, returned to their seats ‘looking pretty dishevelled.’

Close as ever: During their transatlantic Virgin flight, passengers on their plane have claimed the pair were passionately kissing in their seats before sneaking off into the cubicles for 15 minutes

Close as ever: During their transatlantic Virgin flight, passengers on their plane have claimed the pair were passionately kissing in their seats before sneaking off into the cubicles for 15 minutes

Strong bond: They headed to Burberry’s star-studded London Fashion Week show on Monday - where they packed on quite the PDA

Strong bond: They headed to Burberry’s star-studded London Fashion Week show on Monday - where they packed on quite the PDA

Copy Cara in a lattice panel little black dress

The Burberry Prorsum show is the hottest ticket in town during London Fashion Week. And this season was no exception.

With models both on and off the catwalk sporting the brand’s designs, we didn’t know where to look first! Cara Delevingne was among the FROWs rocking the British heritage brand, wearing a custom black Resort 2016 mini teamed with a textured jacket and lattice shoes from the spring/ summer 2016 collection.

Not yet available to buy, you’ll have to wait until next year to get your hands on Cara’s look, but click right to shop the current ready-to-wear collection.

Alternatively, why not get ahead of the fash pack and get next season’s look now with one of the picks from our edit of lattice panel dresses below, including options from Shoptiques, Asos, Missguided and more!

* PRICES MAY NOT BE AS ADVERTISED

‘They didn’t manage to creep in there too discretely, as loads of people saw,’ the source added. ‘Eyebrows were raised throughout the cabin, and some of the crew seemed awkward, but nobody disturbed them.

‘Fifteen minutes later, they reappeared, looking pretty dishevelled before sitting back down in their seats.’

MailOnline have contacted representatives for the stars to comment. 

Both Cara and St. Vincent are thought to have started dating since December 2014, and were first seen together at the Universal BRITs after-party in February.

The model-turned-actress confirmed the relationship earlier this year, just days after the couple made their public debut at a fashion party in Los Angeles.

Lovebirds: They put on a loving display as they got cosy and appeared to whisper sweet nothings to one another ahead of the star-studded show at Kensington Gardens

Lovebirds: They put on a loving display as they got cosy and appeared to whisper sweet nothings to one another ahead of the star-studded show at Kensington Gardens

It's serious: Both Cara and St. Vincent are thought to have started dating since December 2014, and were first seen together at the Universal BRITs after-party in February

It's serious: Both Cara and St. Vincent are thought to have started dating since December 2014, and were first seen together at the Universal BRITs after-party in February

St. Vincent, real name Anne Erin Clark, joined Cara on front row at the LFW Burberry Prorsum Spring/Summer 2016 presentation in London.

They put on a loving display as they got cosy and appeared to whisper sweet nothings to one another ahead of the star-studded show at Kensington Gardens.

Cara looked nothing short of glamorous in a patchwork macramé lace skirt and a chic textured blazer, while St. Vincent showcased her slim figure in a coordinating cut-out dress.

Both appeared to be in great and content spirits as they joined Kate Moss and Sienna Miller, proving things are certainly still going well between the pair. 

Smitten item: The model-turned-actress confirmed the relationship earlier this year, just days after the couple made their public debut at a fashion party in Los Angeles

Smitten item: The model-turned-actress confirmed the relationship earlier this year, just days after the couple made their public debut at a fashion party in Los Angeles

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