When a friend broke the news to Paris, she said, "So happy for her, they are perfect for each other," reports tmz.com.
Paris, 31, and Kim, 32, had a rivalry for years due to their very similar career paths and lifestyles, but recently made up and were spotted out together at a friend's party and at an event in Miami.
Meanwhile, Kim's brother Rob has also voiced his delight at the news, which broke when Kanye called Kim his "baby mamma" live on stage in Atlantic City.
"It's beautiful. It's a blessing. The New Year, we have got another child coming, so that's great. Kim's never had a baby, so it's going to be a beautiful blessing," Rob said.