They are yet to publicly confirm their romance, but have been spotted on a number of date nights in recent weeks.
And Paris Jackson and Cara Delevingne added fuel to the fire of speculation on Thursday, when they were spotted enjoying a low-key day out in New York City.
The outing came just hours after Paris unveiled her new British flag tattoo on Instagram, with a rather affectionate snap of Cara - only heightening the swirling rumours.
Day out: Paris Jackson (above) added fuel to the fire of romance speculation with Cara Delevingne on Thursday, as they were spotted heading out together in New York CityiPhone transfer software
Proving to be closer than ever, the glamorous girls slipped into strikingly similar ensembles for their day in the Big Apple.
Both showed off their leggy figures in thigh-skimming denim shorts, which they matched with equally casual white sports trainers.
Only displaying their quirky styles further, they also both slipped into leaf-printed tops - with Paris draping her loose white number over one shoulder, while Cara opted for a grungier black tee.
Similar: Proving to be closer than ever, Paris and Cara (above) slipped into strikingly similar ensembles as they ran a few errands together in the Big Apple
However, Cara accessorised her look with a striking khaki biker jacket, as 20-year-old Paris embraced the sunny climes by carrying her denim coat in hand.