Amelia Gray Hamlin has a new man in her life.

The model, 24, hard launched her romance with Nicolai Marciano , the heir to the Guess Inc clothing empire, by making their red carpet debut.

"My man," Amelia gushed as she looked over at Nicolai, 29, posing for cameras during an interview with Entertainment Tonight at the GQ Men of the Year party Nov. 13. "He's so cute. Look at him! Oh, my God. He's so good; I love him so much."

While their romance may still be new, the duo have actually known one another since childhood, when Nicolai was a classmate of Amelia's sister Delilah Belle Hamlin , 27.

"I've known him for, like, 15 years maybe now," Amelia shared. "He was on the bus to middle school with my sister, so I've just known him. We've known each other for years growing up

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