By Jessica Earnshaw for MailOnline
Published: 03:25 EST, 27 August 2014 | Updated: 05:27 EST, 27 August 2014
She agreed to wed long-term beau James Rothschild after a romantic proposal in Lake Como in Italy just under three weeks ago.
However fans had to wait until Monday to get their first proper glimpse of Nicky Hilton's impressive engagement ring, which she revealed during a solo outing in New York City.
The 30-year-old heiress undoubtedly turned heads in her monochrome minidress, while her diamond and platinum band was impossible to miss as she chatted away on her phone.
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There it is! Nicky Hilton gave fans the first proper glimpse of her huge sparkler on Monday when she stepped out in NYC's Soho district
Impressive: The diamond and platinum band was presented to her by fiance James Rothschild earlier this month
The blonde beauty has remained coy about her engagement to the heir of the famous European banking family, who she first met at Petra Stunt's wedding in 2011.
A source close to the couple told US Weekly: 'They went on a romantic anniversary trip over the weekend.
'He took her out on a boat into the middle of Lake Como and he proposed, got down on one knee and everything. It was incredibly romantic and beautiful.'
Fashion designer Nicky displayed her huge sparkler while showing off her trim pins in a patterned look, complete with floaty hem and black waist belt.
She kept her glamourous shades firmly on, after styling her long tresses into a braid over one shoulder.
The star polished off her attire with a pair of chic but towering black heels, with lace-up detailing, and a matching satchel.
The insider also told the publication earlier this month: 'They are both really excited and incredibly happy. They are going on a road trip now throughout Europe and celebrating.'
Shady lady: The heiress has remained coy about her engagement to her long-term beau
Nicky - who is Paris Hilton's younger sister - has been married once before. In 2004, she wed childhood friend Todd Andrew Meister at the Las Vegas Wedding Chapel in Las Vegas.
The pair were granted an annulment just three months later after she admitted they had tied the knot 'on a whim.'
Sidewalk strut: The 30-year-old flashed her slim pins in a thigh-skimming monochrome dress on the day, complete with black waist belt
Turning heads: The socialite and fashion designer teamed her dress with chic lace-up heels and a satchel, while her tresses were braided over one shoulder
Mutual friends: The couple, pictured together in May, first met at Petra Stunt's wedding in 2011
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