One day after news broke of Nicky Hilton's engagement to banking heir James Rothschild, sister Paris Hilton took to Instagram to publicly congratulate the couple.
The socialite shared a photo of her sister and Rothschild holding hands on an outdoor stroll, and accompanied it with a heartfelt message.
"Congratulations @NickyHilton on your engagement! I'm so happy for you! You will be the most beautiful bride! Such a lovely couple! Love you both so much!" she wrote.
Hilton met Rothschild at supermodel Petra Ecclestone and James Stunt's wedding in Italy in 2011, and have been dating ever since. According to Us Weekly, the pair returned to the romantic spot for Rothschild's proposal.
"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," a source told the magazine on Tuesday. "It was incredibly romantic and beautiful."