According to People magazine, Hilton and Niarchos were partying together last Friday in Miami. During "Happy Hour", the two were joined by Brandon David and Nicky Hilton at the nightclub Ink. The four wealthy young stars then moved on to finish their evening at Mokai.
Hilton, 25, and Niarchos, 21, finally left the club at 3:15 AM, even though Hilton wanted to stay longer. The hotel chain heiress has also been sporting a new diamond ring on her finger.
Elliot Mintz, a representative for Paris Hilton, said, "Paris is not engaged. She does wear rings on different hands and fingers and depending on what’s comfortable."
A source close to Hilton added, "Not only are she and Stavros) together, but they are in love."