• Cara Delevingne has admitted that she is in a relationship with singer St. Vincent.

Cara Delevingne has admitted that she is in a relationship with singer St. Vincent. (Photo : Twitter)

Supermodel Cara Delevingne was said to be making out with her rumored girlfriend St Vincent in a toilet cubicle in a transatlantic flight.

Recent reports stated that the passengers travelling in the Upper Class section from LAX to London's Heathrow on Sept. 19, Saturday, were left red-faced when the supermodel vanished into a toilet cubicle along with her girlfriend only to reappear after 15 minutes in a pretty dishevelled state.

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Delevingne was reportedly flying to U.K. ahead of her appearance at the premiere of "Pan" when a few minutes into the flight, she started getting passionate with her 32-year-old girlfriend.

"The girls were really PDA-ing," on onlooker told Mirror before further adding that they couldn't keep their hands off each other as they kissed each other passionately.

Later, several passengers saw them going inside a cubicle. Although several eyebrows were raised and even cabin crew seemed flustered, no one disturbed them and they reappeared after 15 minutes.

The 23-year-old supermodel did not seem to mind the attention as the pair made way back to their seats in quite a disheveled state.

The couple, who has been dating since December 2014, was again spotted cozying up at Burberry's London Fashion Week show on Sept. 21, Monday. The pair seemed to gaze endlessly into each other's eyes as they sat closely next to supermodel Kate Moss and Naomie Harris.

At one point, Delevingne leaned in close to the singer, whose actual name is Annie Clark, and planted a kiss on her bare shoulder.

Although both Delevingne and Clark usually tend to remain tight-lipped about their relationship, the former opened up earlier this summer with Vogue to declare that being in love with her girlfriend is primary reason she is so happy nowadays.