He's here! Fourth-time parents Kim Kardashian and Kanye West have made their family complete with the birth of their baby boy. Kim Tweeted the good news Friday at 9am PT: "He’s here and he’s perfect!" The baby boy reportedly weighs 6 lbs, 9 ounces. She also wrote: "He’s also Chicago’s twin lol. I’m sure he will change a lot but now he looks just like her."

The couple used a different surrogate than the one who carried daughter Chicago, 15 months. The couple also have North, 5, and Saint, 3, both of whom Kim carried.

Sis Kourtney teased the impending birth yesterday during a taping the The Ellen Show.