• 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 suffered an embarrassing wardrobe malfunction when her ultra-mini dress gave way to her bare pert derriere when she bent forward in public.

The incident happened at the world premiere of her movie "Pan" at the Oden theatre in London on Sept. 20, Sunday, when the 23-year-old model-turned-actress arrived at the event in a teeny-tiny little black dress which gave onlookers and paparazzi an eyeful of her bums as she bent over a barrier to speak to fans, Mirror reported.

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The British model was sporting a dangerously short LBD with a soft feather effect across the skirt, chest and on the capped sleeves. The dress also had sheer panels, which successfully gave a glimpse of her trim waistline and shoulders. 

While the model chatted away with the fan, she was probably unaware of the fact that those standing at her back got a full view of every inch of her toned thighs and petite derriere. However, she did not seem to mind at all and continued to dazzle at the red carpet, showing off her lovely ensemble and  dark blonde locks that were tied into a high ponytail with twists of plaits running across her scalp.

Other stars present at the event were Delevingne's co-stars including Rooney Mara, Hugh Jackman, Garrett Hedlund and Levi Miller. In comparison to the hazel-eyed model's ultra-mini dress, the 30-year-old actress sported a long yet similar gown that gave a full view of her legs, Daily Mail reported.

"Pan," deemed as one of the biggest movies of the year, is a rework of the iconic Neverland-based fairy tale in which Jackman is playing the leading man, Blackbeard, and Delevingne is portraying a mermaid. While the "The Girl With The Dragon Tattoo" actress will be seen in the role of Tiger Lily, Hedlund  is playing baddie Hook, and  young Levi Miller will play Peter Pan.