Janet Gough/Celebrity Photo
10/09/2009 at 04:25 PM EDT
The Kardashians will soon be keeping up with a little boy.
Kourtney Kardashian, who's expecting her first child with boyfriend Scott Disick around Christmas, has found out that she'll be having a son, her rep tells PEOPLE.
A source adds, "Kourt and Scott are psyched about having a baby, but having a boy is really exciting for them. She can't wait to buy all sort of boy's clothing. And [her brother] Robert is also eager to have a little nephew."
Now that Kardashian knows the sex of the baby, decorating the nursery may be easier. "I just want to work with someone and make it perfect," she told PEOPLE in August. "I have a stylish vision of a room in my head."
Next up for Kardashian, 30, is her baby shower
, slated for Nov. 14 at her mom's home in L.A. "I'm sure my mom has been planning this since I was little," Kardashian said last month. "She is big on showers, so I'm sure mine will be a big event."