Kim Kardashian Engaged

Kim Kardashian, The reality star is engaged to New Jersey Nets forward Kris Humphries, who she has been dating for six months.

When Kim walked into her Beverly Hills home May 18. Her boyfriend, New Jersey Nets forward Kris Humphries, was waiting in her bedroom on bended knee with four words written in red rose petals: “WILL YOU MARRY ME?”

“I didn’t expect this at all,” Kardashian, 30, tells PEOPLE in an exclusive interview (out Friday) of the romantic, surprise proposal. “I was in such shock. I never thought it would happen at home, and I never thought now.”

Humphries popped the question with a custom-designed, 20.5-carat Lorraine Schwartz diamond sparkler.

“Kris really didn’t want a big celebration, but he had jokingly told my mom he’d be fine if there were mini-horses there,” says Kardashian with a laugh. “Later that night at the party, my mom brought out two mini-horses, covered in glitter, for us! It was hysterical!”

On Wednesday morning, Kim’s family hit Twitter to congratulate the happy couple.

Sister Kourtney Kardashian wrote, “My sister is engaged!!! I’m squealing with excitement! The princess has found her prince. I am so happy because @KimKardashian is happy!”